Size 1 diaper weight limit

Size 1 diaper weight limit DEFAULT

It seems like something that should be a pretty cut and dry, but figuring out diaper sizes for newborns, babies or toddlers can be trickier than you’d think — particularly if you’re a first-time parent or new caregiver. Just as the case is with baby clothing sizes, when it comes to diapers, there’s no universal guide for how each size will fit each baby. However, there are things to keep in mind when trying to crack the diaper code. 

“All diapers sizes and fits can be a little bit different, making things slightly confusing at first or if you’re switching brands,” notes Dr. Jen Trachtenberg, a board-certified pediatrician in New York City. “That being said, the main thing to remember is that diaper sizes are based on the weight and size of the baby, not their age.”

A little confused about how diaper sizes work? From signs a baby’s diaper is too tight to the not-so-fun clue a diaper is too loose, here experts and parents weigh in on how to make sense of diaper sizes.

How should a diaper fit?

According to Dr. Brandon Smith, general academic pediatrics fellow in the Department of Pediatrics at Johns Hopkins in Baltimore, there are two measurements parents and caregivers can use when trying to make heads or tails of baby diaper sizes: the size on the box and the size of the baby. 

“Each diaper brand may have slightly different sizing than other brands, so it’s important to always refer to the size chart on the package you’re using to ensure proper fit,” explains Smith, adding that, while properly fitting diapers shouldn’t cause any issues for baby, there are telltale signs that a diaper isn’t fitting correctly. “Irritation on the child’s skin, leakage or a portion of the baby’s bottom being exposed in the back are all signs a child may need a different diaper size,” Smith notes. 

How do you know when a diaper is too small?

The unfortunate reality is most parents and caregivers wind up realizing baby’s diaper is too tight once it’s too late. While you may not be able to be completely ahead of the game when it comes to sizing up, there are a number of signs that will let you know it’s time to move up to the next diaper size. The biggest tell? Blowouts and leakage. (If you know, you know.)

“We never used overnight diapers, so when my daughters’ crib sheets were wet every morning, I always knew it was time to go up a size,” says mom of two Serena Basciano of Garwood, New Jersey. “I wish I knew beforehand, but unfortunately, diapers that weren’t holding up throughout the night always seemed to be the first sign.”

Other indications baby’s diaper is too tight:

  • Diapers are harder to put on. “If you’re having trouble bringing the diaper tabs in on the diaper and you feel like you’re pulling and forcing them in, it’s time to move up a size,” says Smith. 

  • Skin irritation. “If there are deep red marks on the baby’s thighs or there’s an outline after you take the diaper off, it’s a sign it’s too tight,” notes Trachtenberg. Please note: This is different than diaper rash. 

  • Current diapers look small. According to both Smith and Trachtenberg, another indication it’s time to move to the next size is if baby’s current diapers aren’t fully covering their entire diaper area and they seem extra snug around the belly. 

How do you know when a diaper is too big?

In what seems to be a cruel twist of fate, the major (and most frustrating) diaper mishap that indicates it’s time to go up a size in diapers is often the same sign baby needs something smaller: leakage. “Diapers that are too big can also leave you with more stool leaks and blowouts,” says Smith. “You also may see that there’s a lot of room between the diaper and your child’s legs, or that the diaper pulls up way too high above the belly button.” 

The good news, though? There’s no need to get rid of diapers that don’t quite fit yet. “Switch them out for a smaller size but hold on to them,” notes Smith. “Children wind up catching up to the next size sooner than parents think.”

When should babies switch from Newborn to Size 1 diapers? 

Diaper sizes are dictated by baby’s size as opposed to their age, which makes starting out in Size 1 diapers a possibility for some babies. However, there is a benefit to Newborn (NB) size diapers, if baby fits into them. “The majority of babies start off in Newborn size diapers, which are really convenient since there’s an umbilical cord cut-out,” notes Trachtenberg. “This makes it easier to keep the cord stump dry until it falls off.”

According to Smith, Size 1 diapers are generally for babies who weigh about 10 pounds — which varies in terms of age. “The age for a 10-pound baby is a pretty wide gap,” notes Smith. “A baby could be 2 weeks old or 2 months old.” Trachtenberg adds that, on average, babies typically move up to Size 1 diapers at about 1 month old. 

What size do diapers come in?

Sizes vary among brands, but in general, diaper sizes start off with Preemie or Newborn and go up to a Size 6. Also, keep in mind, brands may have different diaper styles for different sizes and ages. For instance, Pampers has Swaddlers, which are recommended for younger babies, as well as Cruisers, which are geared toward more mobile babies between 6-12 months. The diaper sizes among these different styles is generally the same, but like overnight diapers have extra absorbency for (hopefully) long stretches of sleep, each style is tailored toward a particular stage of babyhood.  

Again, it’s important to refer to each box individually, but here are the overall diaper sizes for five top brands:

Diaper size chart by brand and by weight*

Size  Weight (lbs)   
 HuggiesPampersLuvsHonestSeventh GenerationAmazon Mama Bear
Preemie (P)1-5 lbsUp to 6 lbsn/an/an/an/a
Newborn (NB)6-9 lbsUp to 10 lbsUp to 10 lbsUp to 10 lbsUp to 10 lbsUp to 10 lbs
18-14 lbs8-14 lbs8-14 lbs8-14 lbs8-14 lbs8-14 lbs
212-18 lbs12-18 lbs12-18 lbs12-18 lbs12-18 lbs12-18 lbs
316-28 lbs16-28 lbs16-28 lbs16-28 lbs16-21 lbs16-28 lbs
422-37 lbs22-37 lbs22-37 lbs22-37 lbs20-32 lbs22-37 lbs
5>27 lbs>27 lbs27+ lbs27+ lbs27-3527+ lbs
6>35 lbs>35 lbs35+ lbs35+ lbs>35 lbs35+ lbs
7n/a41+ lbsn/an/an/a41+ lbs

* According to size charts on the brand sites at the time of this posting.

TypeSizeWeightCountPampers SwaddlersNewbornup to 10 lbs174Pampers SwaddlersSize 18-14 lbs210Pampers SwaddlersSize 212-18 lbs180Pampers SwaddlersSize 316-28 lbs164Pampers SwaddlersSize 422-37 lbs144Pampers SwaddlersSize 527+ lbs128 Pampers Swaddlers SensitiveSize 18-14 lbs156Pampers Swaddlers SensitiveSize 212-18 lbs132Pampers Swaddlers SensitiveSize 316-28 lbs128Pampers Swaddlers SensitiveSize 422-37 lbs108 Pampers Baby DrySize 18-14 lbs252Pampers Baby DrySize 212-18 lbs234Pampers Baby DrySize 316-28 lbs210Pampers Baby DrySize 422-37 lbs186Pampers Baby DrySize 527+ lbs164Pampers Baby DrySize 635+ lbs144 Pampers CruisersSize 316-28 lbs176Pampers CruisersSize 422-37 lbs156Pampers CruisersSize 527+ lbs132Pampers CruisersSize 635+ lbs112Pampers CruisersSize 741+ lbs84 Pampers Pure ProtectionNewbornup to 10 lbs152Pampers Pure ProtectionSize 18-14 lbs164Pampers Pure ProtectionSize 212-18 lbs148Pampers Pure ProtectionSize 316-28 lbs132Pampers Pure ProtectionSize 422-37 lbs116Pampers Pure ProtectionSize 527+ lbs96Pampers Pure ProtectionSize 635+ lbs84 Pampers Easy Ups – Boys2T-3T16-34 lbs140Pampers Easy Ups – Boys3T-4T30-40 lbs124Pampers Easy Ups – Boys4T-5T37+ lbs104Pampers Easy Ups – Girls2T-3T16-34 lbs140Pampers Easy Ups – Girls3T-4T30-40 lbs124Pampers Easy Ups – Girls4T-5T37+ lbs104 Luvs Ultra LeakguardSize 18-14 lbs252Luvs Ultra LeakguardSize 212-18 lbs228Luvs Ultra LeakguardSize 316-28 lbs198Luvs Ultra LeakguardSize 422-37 lbs172Luvs Ultra LeakguardSize 527+ lbs148Luvs Ultra LeakguardSize 635+ lbs124 Huggies Little SnugglersNewbornup to 10 lbs168Huggies Little SnugglersSize 110-14 lbs180Huggies Little SnugglersSize 212-18 lbs162 Huggies Snug & DrySize 316-28 lbs222Huggies Snug & DrySize 422-37 lbs192Huggies Snug & DrySize 527+ lbs168Huggies Snug & DrySize 635+ lbs136 Huggies Little MoversSize 316-28 lbs174Huggies Little MoversSize 422-37 lbs156Huggies Little MoversSize 527+ lbs132Huggies Little MoversSize 635+ lbs108 Huggies Pull-UpsBoys 2T-3T18-34 lbs124Huggies Pull-UpsBoys 3T-4T32-40 lbs116Huggies Pull-UpsBoys 4T-5T38+ lbs102Huggies Pull-UpsGirls 2T-3T18-34 lbs124Huggies Pull-UpsGirls 3T-4T32-40 lbs116Huggies Pull-UpsGirls 4T-5T38+ lbs102 Member's MarkSize 18-14 lbs176Member's MarkSize 212-18 lbs196Member's MarkSize 316-28 lbs234Member's MarkSize 422-37 lbs210Member's MarkSize 527+ lbs168Member's MarkSize 635+ lbs150
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How Many Diapers Do I Need for Baby's First Year?

Babies go through a lot of diapers. Here's how many you'll need for the first year.How Many Diapers Do I Need for Baby's First Year?

New parents focus a lot on getting the right bouncer and cute crib sheets for their baby. And while those are nice to have, there’s one thing you’ll rely on more than anything else as a new parent: diapers.

How Many Newborn Diapers Do You Need?

In the first month of life, newborns average up to 8 to 10 diaper changes per day. And over the first three months (the newborn stage), babies go through about 700 diapers.

The good news? A baby’s bladder grows with age, so you’ll change fewer diapers as they get older—think 5 to 6 diapers a day after six months of age. So the days of changing diapers every two hours won’t last forever. We promise!

How Many Diapers Do You Need in the First Year?

A baby can go through an average of 2,200 diapers in the first year. That’s a lot of wet bums. Your baby shower is a great time to start a diaper stockpile, if you have the space to store them.

When you’re creating your baby registry and you’d like to build your reserve of diapers, know that you can register for enough diapers for an entire year, either by adding individual boxes of diapers for people to gift to you, creating a diaper cash fund in order to purchase the diapers yourself, or by registering for a diaper subscription service.

Want to Add Diapers to Your Registry?

With Babylist, you can add any item from any store onto ONE registry. Start your registry today and get a Hello Baby Box full of free (amazing!) goodies.

How to Stockpile Disposable Diapers

To help you build up a big diaper stash before your due date, here are tips on everything from how many to register for to how to figure out what size diapers you’ll need for each stage.

Tip #1: Don’t focus on the newborn size

On average, a newborn diaper fits babies up to 9 pounds. Take into account that a newborn will often gain up to three pounds in their first month of life. And most hospitals will send you home with an armful of newborn diapers, so you most likely won’t need to buy a lot.

Although newborn diapers are the most common size people typically gift at showers, you probably don’t need to register for more than one or two packs of newborn diapers (120-240 count). It’s possible your baby will outgrow them within the first few weeks or even skip them entirely and go straight into Size 1 after birth. What might be a better option? Ask for sizes your little one will quickly grow into.

Remember: Diaper sizes are based on the weight, not the age of the baby. Here’s a look at diaper sizes for Huggies Little Snugglers, for example:

  • Preemie: Up to 5 lbs
  • Newborn: Up to 9 lbs
  • Size 1: 8 - 14 lbs
  • Size 2: 12 - 18 lbs
  • Size 3: 16 - 28 lbs
  • Size 4: 22 - 37 lbs

Tip #2: Consider baby’s growth rate

If you have limited space, the bulk of your diaper collection should be for sizes 1 and 2. These diapers generally fit babies up to 18 pounds, depending on the brand.

If you have the storage, register for Size 3, as well, which should take you through your baby’s first birthday.

Here’s a rough guide of what to register for if you’re looking to build out your diaper supply for a year:

  • 1 to 2 boxes of Newborn Size (based on a 128 pack size; babies will typically be in this size for 1 month or less, with an average of 8 diaper changes per day)
  • 4 to 5 boxes of Size 1 (based on a 168 pack size; babies will typically be in this size for 3 months, with 6-9 diaper changes per day)
  • 5 boxes of Size 2 (based on a 148 pack size; babies will typically be in this size for 3 months, with with 6-9 diaper changes per day)
  • 8 boxes of Size 3 (based on a 136 pack size; babies will typically be in this size through the rest of their first year—and beyond—with an average of 5-7 diaper changes per day)

How to register for diapers for the first year

Tip #3: Diapers for girls and boys

Your baby’s sex can play a part in how soon you need to size up. Average-size baby boys usually move into Size 1 diapers around four weeks old and Size 2 diapers at about three to four months.

Average-size baby girls reach the same milestones later, transitioning into Size 1 diapers around six weeks and Size 2 diapers between four or five months.

Also, baby boys tend to have more “accidents” on the changing table. Many parents who’ve had both boys and girls swear baby boys go through more diapers, but it all depends on who you ask.

If you’re worried about wasting diapers when changing your baby boy, keep a cloth or wipe over them in case of an accidental squirt. This will help cut down on diaper waste—and keep you dry too.

Tip #4: Boxes vs. bags of diapers

Bags of diapers contain fewer diapers than boxes, so many parents go the bag route for the newborn size to prevent over-ordering.

For babies graduating into a new size, a box is usually the more affordable option because the per-diaper cost is less. Like this:

  • A bag of Size 3 Huggies Little Snugglers (26 count) averages $.34 per diaper
  • A box of Size 3 Huggies Little Snugglers (124 count) averages $.29 a diaper.

Tip #5: Save money on diapers later

Keep in mind that online retailers like Amazon have subscribe-and-save options, where you can save money (like 5%) when you have diapers delivered on a regular schedule.

Don’t have enough space to store lots of diaper boxes ahead of time? Register for gift cards and use them to buy diapers later on.

How Many Cloth Diapers Do You Need?

If you want to do cloth diapering, you’ll probably still need diapers on reserve, even if you plan on running the wash cycle every day. Some parents who use cloth diapers choose to use disposables for the first month, simply because newborns go through so many per day.

But if you do want to invest in newborn cloth sizes, have at least 20 on hand (trust us, it’s not too many!). Keep in mind, your baby may not fit into these for long.

How often you plan on doing laundry influences the amount of cloth diapers you’ll need to have on hand. Most families like to have 24 cloth diapers total, but you could get away with as few as 14 if you absolutely needed to (and don’t mind washing them every day).

Whether you opt for disposable or cloth diapers, you might not know what works best on your baby right away. And that’s okay: You’ll figure it out through a bit of trial and error. Get a feel for what you and your baby like by adding a variety of diaper brands and sizes to your registry and then experimenting once your little one arrives.

This information is provided for educational and entertainment purposes only. We do not accept any responsibility for any liability, loss or risk, personal or otherwise, incurred as a consequence, directly or indirectly, from any information or advice contained here. Babylist may earn compensation from affiliate links in this content. Learn more about how we write Babylist content and the Babylist Health Advisory Board.Sours:
Ultimate Diaper Comparison by Velona Cuddles - Sri Lanka's number 1 diaper

Diaper Size and Weight Chart Guide

Diaper Size and Weight Chart Guide

Wondering which diaper size to choose for your little one? Pampers has worked with more than 8,000 babies and their parents, taking over 400,000 diaper fit measurements, to come up with just the right range of sizes for every family.

Here's a simple diaper size chart you can use as a quick guide to the best diaper size for your baby:

Picking the Right Pampers Diaper Size for Your Little One

To find a diaper size for your little one, use our diaper size finder below, adding your baby’s weight to come up with the best Pampers diaper size for your baby.

The guide will also provide an average number of diapers you can expect to use and will let you know about how many months your little one will need this size. It’s a great tool for planning ahead!

Read on to find out more about how you can check whether your baby’s diaper fits perfectly, when to switch to a bigger diaper size, and which Pampers diaper is best for your little one—from newborn diaper sizes and beyond. Plus, pick up some tips on how to help prevent leaks and blowouts.

Making Sure the Diaper Fits Right

As you know, babies come in all sizes and shapes, so diapers fit a bit differently on every baby. To keep things simpler, Pampers diapers sizes are based on baby weight—not things like age or gender.

Most of the time, your baby's weight will fall neatly within the range of a certain diaper size, producing a good fit. In some cases, you might have a choice of two sizes, as the weight ranges can sometimes overlap.

If you have a baby who is long and slim, for example, you might need to go with the smaller of the two sizes for the best fit.

Beyond checking to make sure the diaper suits your baby’s weight, there are four quick checks you can do to make sure your baby’s diaper fits properly:

  1. The diaper’s waistband should sit just under your baby’s belly button.

  2. The leg cuffs shouldn’t have any gaps. After the diaper is on, run two fingers just inside the leg cuffs to get them in the proper position to help prevent leaks.

  3. After the diaper is fastened, you should be able to fit two fingers under the waistband. This means the diaper is fitted properly — not too snug, not too loose.

  4. When you take the diaper off, you shouldn’t see any red marks.

How to Weigh Your Baby

To weigh your baby, you can use your normal bathroom scale. Take off your baby’s clothes and diaper, and then step on the scale while holding her. Record the number. Then, step back on the scale without your baby. Subtract the second number from the first number to get your baby’s weight.

When to Change Diaper Sizes

Some signs your baby might be ready for a different size diaper:

  • If the fastening tapes don't reach the center of the waistband, it's time for a bigger size; if the tapes overlap, the diaper may be too big.

  • If you can't comfortably fit two fingers under the waistband of the fastened diaper, it's time for a bigger size.

  • You may need to go up a size if you notice red marks on your baby's tummy or thighs when you remove the diaper.

  • If the diaper isn't fully covering your baby's bottom, choose a bigger size.

  • If your baby regularly gets diaper rash it may be because her diapers are too small and don't hold the moisture away from the skin.

  • The diaper may be too small if your baby is showing signs of discomfort (for example, pulling at the diaper).

Which Pampers Diaper Is Best for My Baby?

As your baby grows, he'll have different diaper needs. Here are some things to consider when choosing which Pampers diaper to buy:


Newborns have very delicate skin, so choose a diaper that's:

  • very soft

  • super absorbent to keep your baby's skin dry

  • designed so it doesn't rub against the umbilical cord stump

  • easy to put on and fasten.

Consider Pampers Swaddlers, Swaddlers Sensitive, or Pampers Pure Protection at this stage.

Growing Babies:

Dryness will be your biggest focus when your little one is around 6 to 12 months old. Consider Pampers Baby-Dry or Pampers Cruisers.

On-the-Go Babies:

When your little one is wiggling a lot, crawling, or beginning to walk, consider diapers that are easier to take off quickly. For example, you might like Pampers Cruisers 360° Fit or Pampers Easy Ups.

This chart summarizes the sizes that each Pampers diaper is available in to help you select the right one:

Why Do Leaks and Blowouts Happen?

  • If a diaper is too small, it can leak because there isn’t enough absorbency for the volume of pee or poop.

  • If the leg cuffs don’t fit properly or are tucked insider the diaper, pee can leak out the sides.

  • If a diaper is too big, urine and poop may leak out of the gaps before the diaper can absorb it.

How to Prevent Leaks and Blowouts

Do the following to help prevent diaper leaks and blowouts:

  • Check the diaper to make sure it looks straight and balanced on your baby.

  • Make sure the waistband sits just under your baby's belly button.

  • Make sure the tapes align with the colored waistband when they're fastened.

  • Run two fingers under the waistband so you're sure the diaper isn't too tight or too loose.

  • If you have a baby boy, check to make sure his penis is pointing down inside the diaper.

  • Pull the leg cuffs out by running your fingers around the leg cuff after the diaper is on.

  • If you've done all this and checked you've got the right diaper size, it could be time to choose a more absorbent diaper, like Pampers Baby-Dry or Pampers Swaddlers Overnights.

Once you find the best diaper size for your little one using either our diaper fit finder tool or our diaper size chart, selecting the right diaper will be a breeze. Your baby will be comfier, and you'll feel more confident knowing that your little one will have far fewer accidents with leaks or blowouts.

Still, just in case a leak and blowout happens, keep your diaper bag well stocked using our diaper bag checklist to make sure you're prepared for all situations.


1 diaper limit size weight

Becoming a new parent can be confusing enough; the last thing you should worry about is deciphering a diaper size chart to figure out which ones to stock up on. Babies go through thousands of diaper changes before potty training, so there's no doubt you'll be a diaper expert by the time you're through.

Until then, the parenting experts at the Good Housekeeping Institute break it down for you here. Our fiber scientists evaluate diapers in the Textiles Lab using a variety of absorbency tests, including how quickly each one can absorb fluid, how much liquid leaks off when the diaper's held at an angle, and how dry the surface stays when a weight is applied. We also send them home with parent testers to get in-depth, real-life feedback.

How do diaper sizes work?

First things first: Diapers are sized by weight and not by age. Most babies will start in the Newborn size (which also has a cut-out in the front for the umbilical cord) then ultimately spend the majority of their diapering days in size 4, the most popular size on the market. Beyond that, there's no way to accurately predict ahead of time what size diapers your baby will be in at each age because babies grow at different rates. Still, it's safe to say babies will at least cycle through sizes 1, 2, and 3 during the first year.

Most disposable diaper brands are available in sizes Newborn through 6. On either end of the spectrum, Huggies and Pampers both offer a Preemie size for babies under six pounds, while Pampers even offers size 7 for toddlers over 41 pounds. Here is your ultimate diaper size chart based on the most popular, best performing diapers on the market:

Babies grow so quickly during the first year so they'll spend less overall time in the smaller-sized diapers, yet you'll use up more diapers when they're younger. Newborn babies can go through 12 diapers a day (that's 360 diapers in the first month!), but that drops down to 5-8 diapers per day by the end of the first year. Keep in mind: The smaller the diaper size, the more diapers you get in each box. Diaper packages may cost the same when you buy them, but you're paying slightly more per diaper as you size up.

When to switch to the next diaper size

You'll notice there's some overlap in weights between sizes. If your baby is in between and you truly can't decide, we recommend sizing down because the cost per diaper is less and a too-loose diaper can cause leaks. Still, your best bet is to pay close attention to when your baby is outgrowing their current size. Here's what to look out for:

  • Stretch at the waist: The tabs to secure the diapers should fit snug without you having to pull them shut.
  • Coverage around the legs: Your baby's bottom should be fully enclosed by the diaper to prevent leaks and blowouts. The leg cuffs shouldn't be tucked in.
  • Red marks on skin: If you see impressions when you change the diaper, it could be a sign that the fit is too tight.

Parents sometimes complain that Newborn diapers seem too small, yet Size 1 seems too big. If this is the case for you, try using Size 1 and folding down the waist before you put it on. You can also consider trying another brand; every baby is shaped differently and some brands may fit your little one better than others.

Your Disposable Diaper Size Guide by Brand

If you're looking for information on a specific diapers, here are the best performing and most popular options on the market, with the size charts exactly how they're shown on the brand's website:

Pampers Size Guide

Pampers is a Good Housekeeping Seal holder and has the most diaper sizes to choose from, with Preemie available in Pampers Swaddlers and Size 7 available in Pampers Cruisers. Though they're not as widely available, you can also get extended Preemie sizes P-2 for under 4 lbs and P-3 for under 1.8 lbs.

The brand also has the most diaper style options on the market, including Pampers Pure for a bigger focus on plant-based materials and Pampers Cruisers 360 Fit for active babies. Just note that size offerings will vary by style; for instance, Cruisers and 360 Fit start at Size 3 because they're designed for crawlers and walkers.

  • Premie: <6 lbs
  • Newborn: <10 lbs
  • Size 1: 8-14 lbs
  • Size 2: 12-18 lbs
  • Size 3: 16-28 lbs
  • Size 4: 22-37 lbs
  • Size 5: >27 lbs
  • Size 6: >35 lbs
  • Size 7: >41 lbs

Swaddlers Diapers



Cruisers Diapers



Pure Protection Diapers


Swaddlers Overnights Diapers


Huggies Size Guide

This is another popular choice (and one of our top-tested diaper brands) with lots of options to choose from. Diapers sizes range from Preemie to 6, but like Pampers they'll vary by style. Little Snugglers is the only diaper in Preemie and Newborn sizes, while Little Movers (for crawlers and walkers) start at Size 3.

  • Premie: <6 lbs
  • Newborn: <10 lbs
  • Size 1: 8-14 lbs
  • Size 2: 12-18 lbs
  • Size 3: 16-28 lbs
  • Size 4: 22-37 lbs
  • Size 5: >27 lbs
  • Size 6: >35 lbs

Little Snugglers Diapers



Little Movers Diapers



Snug & Dry Diapers



Overnites Diapers



Luvs Size Guide


Triple Leakguards Diapers


Luvs is Pampers' more affordable sister brand. Unlike Pampers and Huggies, there's just one diaper style so you don't have to make the choice, and it's available in sizes Newborn through 6.

  • Newborn: Up to 10 lbs
  • Size 1: 8-14 lbs
  • Size 2: 12-18 lbs
  • Size 3: 16-28 lbs
  • Size 4: 22-37 lbs
  • Size 5: 27 lbs+
  • Size 6: 35 lbs+

The Honest Company Size Guide

The Honest Company

Honest Diapers

The Honest



These diapers are popular for their fun prints and eco claims, plus they performed well in our test. There's just one style for daytime in a wide range of designs, plus an overnight option.

  • NB: Up to 10 lbs
  • Size 1: 8-14 lbs
  • Size 2: 12-18 lbs
  • Size 3: 16-28 lbs
  • Size 4: 22-37 lbs
  • Size 5: 27+ lbs
  • Size 6: 35+ lbs

Bambo Nature Size Guide

Bambo Nature

Eco Friendly Baby Diapers




The brand is pricey per diaper, but it's a great choice if you prefer greener options because it has transparent claims and performed better than other "eco" brands. They're European, so make sure to check the size chart because it's entirely different from the others in this roundup.

  • Size 0: 2-7 lbs
  • Size 1: 4-11 lbs
  • Size 2: 7-13 lbs
  • Size 3: 9-20 lbs
  • Size 4: 15-40 lbs
  • Size 5: 24-55 lbs
  • Size 6: 33-66 lbs

Seventh Generation Size Guide

Seventh Generation

Free & Clear Diapers



The company has a big focus on sustainability for a variety of consumer products. The diapers are available in day or overnight, though they didn't perform quite as well as others in our test. Also note that the size chart differs slightly from some of the other popular brands, so double check before you buy.

  • Newborn: Up to 10 lbs
  • Size 1: 8-14 lbs
  • Size 2: 12-18 lbs
  • Size 3: 16-21 lbs
  • Size 4: 20-32 lbs
  • Size 5: 27-35 lbs
  • Size 6: Over 35 lbs

Hello Bello Size Guide

Hello Bello

Hello Bello Diapers




This is a newer brand with tons of adorable prints, and it was one of the most absorbent diapers in our Lab's tests. They have two styles: A standard diaper and an overnight option. The size chart runs a little smaller than others, so this is another one where you'll want to review it carefully before you buy.

  • Newborn: Up to 10 lbs
  • Size 1: 8-12 lbs
  • Size 2: 12-18 lbs
  • Size 3: 10-16 lbs
  • Size 4: 22-37 lbs
  • Size 5: 27+ lbs
  • Size 6: 35+ lbs

What about other types of diapers?

If you're confused on how to pick the size for a style of diapers that we haven't yet covered, here's the scoop:

  • Overnight diapers are extra absorbent since you won't be changing them as frequently. They're sized the same way as daytime disposable ones, so you can follow the same size chart. We actually recommend going up one size for overnight styles so you get a larger absorbent core to soak up fluid. Just note that they typically begin at size 3 since most babies aren't sleeping through the night before then.
  • Swim diapers are designed specifically for water use – unlike regular diapers, they won't swell up when they're wet. They have a pull-on, elastic fit and typically come in sizes Small, Medium, and Large, which are similar to diaper sizes 3, 4, and 5, respectively.
  • Cloth diapers are reusable, machine washable alternatives to the disposable kind. They're usually one-size-fits-all for roughly 6 pounds to 35 pounds because they have built-in adjustable snaps.
  • Training pants are technically diapers, but they have an elastic waist that can be easily pulled down during potty training. These are sized differently than regular diapers and are more aligned with age and clothing size. The typical sizes are 2T-3T, 3T-4T, and 4T-5T.

Lexie Sachs, Good Housekeeping InstituteTextiles DirectorLexie Sachs earned her Bachelor of Science degree in Fiber Science from Cornell University, and she researches, tests and reports on fabric-based products ranging from sheets, mattresses and towels to bras, fitness apparel and other clothing.

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Ultimate Diaper Comparison by Velona Cuddles - Sri Lanka's number 1 diaper

Many parents who love to plan ahead want to know just how long their baby will wear size 1 diapers. 

Though not an exact science, research has developed a fairly accurate growth trajectory that helps parents predict how long their little ones will wear each size of diaper. 

Diaper Size by Weight

For starters, diaper sizes are determined by weight.  So, since no two babies grow the same, the length of time in size 1 diapers can vary significantly from family to family. 

how long is baby in a size 1 diaper

A myriad of factors can affect a newborn’s growth rate.  Some of these factors include feeding practices (formula vs. breastfeeding), family health history, whether or not there is an illness at birth, length of gestation, and the list goes on. 

All of that to say, there is not a guaranteed system for determining the exact growth pattern of your baby. 

However, with the help of science, we can make some pretty accurate guesses just how quickly your little one will grow and hence, how long you can plan to have them in size 1 diapers.

Recommended Diaper Sizes

After researching all of the major brands of diapers on the market, I compiled a short list of the average recommended weight ranges for each of the first few diaper sizes. 

Diaper SizeWeight Range
Newborn0-10 lbs.
Size 18-14 lbs.
Size 212-18 lbs.  

How Long Will Baby Be in Size 1 Diapers?

So, how long can one expect their little one to be in the size 1 category? The average baby will be ready for size 1 diapers as early as birth, or during the first month or two, and size 1 will fit them comfortably for approximately 3-4 months. 

According to studies, the average birth weight of a newborn ranges between 5.8 and 10 pounds.  That means a newborn can fit into size 1 diapers shortly after birth. Anything less than 5.8 pounds would generally fit into the preemie diaper category. 

Taking into consideration all the various factors that affect growth, researchers and medical professionals have concluded that the average newborn will grow 1.5-2 lbs per month for the first 6 months of his or her life. Hence, baby should outgrow size 1 diapers by 4 to 5 months old.

Let’s look at an example.  If a baby weighs in at 7 pounds at birth, it will reach the recommended weight range for size 1 diapers within a few weeks.  If growth continues as usual, it will take the infant approximately 3-4 months to outgrow the recommended weight limit for size 1 diapers. 

As you can see in the chart, there is an overlap in the weight amounts assigned to each diaper size.  So this time frame can be shortened or extended depending on the parents preference. 

Planning Ahead for Diapers

If you are looking to buy diapers ahead of time, this is a great diaper cost calculator tool. This calculator will help you determine how many diapers to buy based on the average amount of diaper changes a day for each diaper size. 

Using the research listed above, this calculator uses the gender, weight, and your choice of budget category to determine how many diapers and wipes you will use at each stage of development.  Once you select your options, this calculator also breaks down the payments by quarters so you can budget accordingly. 

This is a great tool in helping you plan ahead! It also helps if you buy the most affordable diaper brands. 

Planning for Newborn Diapers

Let’s look at some examples. Using the diaper cost calculator, let’s go back to our original example of a baby boy born weighing in at 7 lbs at birth. 

This brings us to the following table that tells approximately how many diapers we will need in each diaper size category.

So let’s break it down even further. 

Let’s say you want a rough estimate of how many newborn diapers to have on hand.  Research shows that the average newborn will need to be changed approximately 8-12 times a day.  If your child is born into and continues in the trajectory of normal growth, your baby will need approximately 3-4 weeks worth of newborn diapers. 

According to the calculator, this will range between 210-300 newborn diapers.  These can be purchased in smaller packs/bags (around 40-50 diapers) or can be purchased in bulk boxes. 

Depending on which of the top diaper brands best suits your family, a box of diapers can range from 120-134 diapers per box.  Some moms enjoy using the newborn phase to purchase different brands of diapers in smaller packs until they find the best fit for their little one.  Once they’ve determined the best fitting diaper brand, then they can transition to ordering size 1 diapers in bulk boxes.

Planning for Size 1 Diapers

Going back to our example, after the first 3-4 weeks, this little 7 pound nugget has probably grown to nearly 9 pounds. The number of diaper changes per day has likely decreased slightly. 

Using the same diaper cost calculator, we can determine that our baby will use approximately 230-270 size 1 diapers per month.  If your infant continues to grow at the same rate, you will likely need somewhere between 460-550 size 1 diapers before your little one is ready to move on. 

Depending once again on which brand your family has chosen, you can get between 96 and 196 diapers in each size 1 box.  Size 1 diapers can also be purchased in smaller bags that usually contain about 30-35 diapers in each bag (lasting the average family about 1 week). 

So, unless you have a giant closet devoted to storing diapers, most moms with experience recommend only buying 1-2 boxes of size 1 diapers at a time.  

FAQ’s About Diaper Sizing

How will I know when my baby needs to move up to the next diaper size?

There are a few common issues that are tell-tale signs its time to change diaper sizes. 

  • Frequent diaper blowouts is the most common sign that it is time to move up diaper sizes.  If you are suddenly experiencing a lot of diaper leaks but your little one is still having regular bowl movements, this could mean its time to try the next diaper size up. 
  • If you are having to tug harder than usual to secure the diaper tags, or if you notice consistent red marks on your baby’s legs or waistline, it probably means your little one is ready to try the next size up.  Most diaper companies say that a sign of a good fitting diaper is if you can easily slide two fingers under the waistband of the diaper.  If you the diaper tabs keep popping open or you have to pull the tabs too tight to secure them, it is probably time to move up to the next diaper size. 
  • Check your diaper brand’s diaper sizing chart, usually available on the side of the diaper box or on their website. if you notice that your baby’s weight is on the higher end of their recommended sizing guidelines, it’s probably a good idea to start buying the next size up. 
  • Frequent diaper rashes is another sign that your infant’s diaper might be too snug on his/her bum.  A good fitting diaper allows for a certain amount of airflow that avoids rashes between diaper changes.  If the diaper is too small, you will probably not only experience leaks, but also redness and soreness.  So, if this is the case and you’ve ruled out food-related issues, you may want to try either another brand or the next size up.     

Do I need to buy Newborn diapers or just start with size 1 diapers?

Many moms with experience agree that you should not focus on the Newborn diaper size. 

The recommended weight limit for newborn diapers is between 8-10 lbs, depending on the brand.  Some babies weigh this much right out of the gate.  So, many moms recommend having a couple of weeks worth of newborn diapers on hand but also having a large quantity of size 1 diapers in stock. 

The average growth chart predicts that babies will be ready for size 1 diapers within 3-4 weeks.  So, while it’s really not possible to predict how quickly your little one will start putting on the pounds, it’s much better to be prepared in advance than surprised and unprepared. 

How many size 1 diapers should I order?

This depends a lot on how often the baby gets their diaper changed.

As in infant grows, the number of diaper changes per day usually decreases.  In the first few weeks, it’s not uncommon to need to change your baby’s diaper every couple of hours.  As they approach the weight limit for size 1 diapers (8-14 lbs.), most diaper companies and researchers agree that your baby will probably need 6-9 diaper changes per day.  This comes to approximately 225 size 1 diapers per month. 

Many moms of experience recommend buying only 1-2 large boxes of diapers at a time for a couple of reasons. 

First, you need ample storage space to house that many diapers. 

Second, if your child hits a sudden growth spurt, you probably don’t want to be stranded with a bunch of diapers your little one can no longer use.  However, in that event, you may want to consider finding a local center or shelter that would be glad to put those diapers to good use.  

Will formula affect my baby’s growth rate out of size 1 diapers?

The short answer is yes, formula has been known to help babies “chunk up” faster than breastfed babies.  This does not mean formula-fed babies are healthier than breastfed babies.  However, studies have shown that breastfed babies tend to gain weight at a slower pace than formula-fed babies. 

Pediatricians and researchers did note that these effects do not typically manifest themselves until after the baby is 4 months old. 

So, for the question at hand, formula should not affect how long your baby is in size 1 diapers.  As noted earlier, the average baby will reach the recommended size 2 diaper weight around 3-4 months.    

Share and Visit


  1. Average Newborn Weight: What Are Normal Baby Weight Gains and Losses?,
  2. Infant growth: What's normal?,
  3. 4 Ways to Tell It's Time to Go Up a Diaper Size,
  4. Average Newborn Weight,

Mary Bogard

Mary is a wife to her husband Jake and a mother of two boys. She loves music and reading and anything that involves being outside. Nothing is good for the soul like sunshine! As a world traveler, Mary has also had the opportunity to see moms around the world in action. Being a mom is a privilege and it is Mary's passion to help moms everywhere find the very best for their families.


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She finished long and plentifully, probably the reason for everything was her loneliness and long absence of sex. A minute pause gave us a chance to rest. -Take me. - cried the mother-in-law, tearing off the remnants of her clothes. I also quickly undressed and, picking her up in my arms, went into the bedroom.

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