Diaper Sizes by Weight – Choosing the Right Diaper for You Baby

Buying diapers for your child can seem like a very regular routine for you. But for new parents, it can be a difficult thing at first. Especially when you buy diapers and discover that you’ve purchased the wrong size. So, getting familiar with the correct diaper sizes by weight is very important and will make your diaper shopping even easier.

There are many diaper sizes to choose from and it varies according to baby’s weight. But there are also other factors to consider in deciding the right diaper for your baby. Also, when you’re out buying diapers, it’s impossible to try it and fit it on your baby. So, we’ll be giving you some advice on choosing the right diaper size.

How Should a Diaper Fit?


Including weight, there are other factors to consider in choosing the right diaper that will fit perfectly on your baby. Here’s some advice on choosing the right size, the perfect fit, and moving on to the next size.

Diaper Types and Sizes

There are different kinds of diapers to choose from and it’ll boil down to choosing between cloth diapers or disposable diapers. Unlike baby clothes that are sized by age, disposable diapers are usually sized by weight. On the other hand, most cloth diapers fit from newborn until toddler.

So first, decide what type of diapers you’d like to use. Then proceed to check your baby’s weight to find what size you should begin with.

Choose the Right Size

The chart below is an excellent guide to choosing the right size by the weight range of your baby. But it doesn’t end there. A diaper that perfectly fits your child will have no leaks, gaps or marks on your baby’s legs. Most manufacturers label their diaper packaging with the proper weight range and that is a helpful starting point.

Despite following the manufacturer’s sizing chart, it doesn’t assure that it will fit properly on your baby. Some diapers have flexible sizes and some can overlap each other. As parents, you need to use your best judgment in choosing the proper size for your baby. For example, a very chubby baby may not fit in their recommended size. So, sizes do matters.

Standard Diaper Sizes Chart by Age



1-5 lbs (0-2 kg)


6-9 lbs (2-4 kg)


8-14 lbs (3-6 kg)


12-18 lbs (5-8 kg)


16-28 lbs (7-13 kg)


22-37 lbs (9-17 kg)


>27 lbs (>12 kg)


Proper Fit

Knowing your baby’s weight will usually make it easier to choose the appropriate diaper size. It’s advisable not to buy large quantities of diapers until you are sure of the size that you need. Also, babies grow fast and outgrow sizes easily, so buying one size in bulk is not practical.

To know if a diaper fits appropriately, check how tight or loose it is around the legs and waist. Put two fingers between the diaper and your baby’s leg or waist and slightly lift it. A correctly fitting diaper should have a little room. The elastic should not be tight to leave marks and not too loose to cause leaks.

Lastly, the top of the diaper where the tabs close should approximately be two inches below your baby’s belly button. Any higher than that is too big and any lower is too small.

Signs That the Diaper is Too Small

As your baby grows bigger, you should look for signs that indicate it is time to move to the next size. What are these?

  • If the diaper is leaving marks on your child’s legs or waist, this means it is too tight and can cause some irritability and blisters on your child’s skin.
  • When the diapers leak often, it means that it is not large enough to keep in the amount of your baby’s urine. A larger diaper is needed for a bigger and more absorbent area to prevent leaks.
  • If the diaper clings on to baby’s bottom, this means he or she needs a larger size. The sides of the diaper should have a snug fit but with enough room for the bottom.
  • When the diaper tabs cannot reach the middle part and cannot fasten correctly, it is time to get a larger size.

Diaper Sizing and Tips

  • Many babies stay in a medium size for a longer period compared to other sizes.
  • At around 8 months, some babies move up to a large size but can come back to medium when they become more active
  • Wondering when is the best time to potty train your child? Most babies are almost potty trained before moving to the extra-large size which is size XL.
  • Pull up diapers is the best choice when outing as it’s easier to put on just like a regular pant. To take it off after soiled, just simply tear off the side connecting lines.

Top 3 Best Baby Diapers for Infant Reviews

Pampers Swaddlers Newborn Diapers

Pampers Swaddlers Diapers is an excellent choice for newborn babies up to 10 pounds because it has a blanket-like softness that is not harsh on baby’s skin. It’s a great diaper to bring in your hospital bag for giving birth because it has an umbilical cord notch that is perfect for newborns.

It has a wetness indicator to let you know when baby needs to change. This allows you to follow the ideal diaper changing time which is every 2 to 3 hours to avoid rashes and skin irritations. Plus, the quilted backsheet is soft with stretchy sides and extra padding that offer added comfort for baby.

Some parents say that they experience a few leaks with this diaper, but as we mentioned earlier, the diaper should fit snugly on your baby so prevent this. So, do check carefully if the diaper is put on correctly. Overall, Pampers Swaddlers is one of the best diapers for newborns and is an excellent option for sensitive baby skin.


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Andy Pandy Eco Friendly Premium Bamboo Medium Disposable Diapers

Eco Friendly Premium Bamboo Disposable Diapers by Andy Pandy is one of the best options for natural diapers in the market. This diaper is made from the highest quality materials such as bamboo, that is both absorbent and eco-friendly. So, you get to save money by using less while also caring for the environment.

Since many parents are concerned about diapers filling up landfills, this is a great option because the material is 100% biodegradable. Aside from being absorbent, it is soft, silky, and naturally hypoallergenic that is safe for baby’s sensitive skin.

The diaper is free from harsh chemicals and is made from renewable resources without the fertilizers or pesticides, making sure that your baby is safe and free from rashes. Its bamboo fiber top sheet wicks moisture away for additional protection to your baby’s skin.

Andy Pandy is a notable product when it comes to natural disposable diapers and many parents love how it is natural, eco-friendly, and safe for their baby especially for those with sensitive skin. Read here to find more about diaper for sensitive skin.


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Huggies Little Snugglers Size Preemie Diapers

Huggies Little Snugglers Preemie offers diapers from a weight range of preemie up to 6 pounds. It also has umbilical cord cutout that protects your newborn’s belly button as it heals after birth.

The diaper has a gently absorb liner that provides a soft layer for protecting your baby’s bottom from the mess to avoid irritable rashes. The diaper is hypoallergenic and fragrance-free which makes it suitable for newborns and infants as well. The soft outer layer is very breathable to allow air to pass to your baby’s bottom.

It has a wetness indicator which will inform you when it’s time to change without having to peek inside the diaper. This will avoid prolonged diaper use which can cause urinary tract infections and rashes. Lastly, it has a secure waistband which will keep the mess in and prevent blowouts.

The Huggies Snugglers line is one of the best infant diapers because it covers all the weight ranges. Aside from that, it has the features for the best gentle skin protection for your baby.


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Top 3 Diapers for Toddler Reviews

Pampers Cruisers Size 7 Diapers

Pampers Cruisers is one of the highly-recommended diapers for toddlers. It comes in sizes 3 up to 7 and can accommodate your increasingly active baby. This diaper is known not to sag when worn, unlike other diapers, because it has extra-absorb channel feature that helps distribute the wetness and not stay in one area of the diaper.

This has a 3-way unique fit that adapts to every babies’ legs, waist, bottom so that your baby can comfortably move. It has flexible leg cuffs that gentle to the baby skin and secure in the mess to prevent leaks. And it has soft, stretchy sides that keep up with your baby’s movements while staying in place.

Many parents swear by this brand because they are soft and they fit well. The tabs don’t easily come off with an active toddler and most importantly, they don’t cause skin irritations.

True to its name, this is one of the best diapers for toddlers who are learning to cruise and becoming more active. It has a comfortable fit so that baby has the freedom to move while the diaper effectively keeps the mess in.


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Luvs With Ultra Leakguards Size 5 Diapers

Luvs With Ultra Leakguards is another brand that is suitable for toddlers. Their sizes are from newborn until size 6, so this is another option to use throughout your baby’s years. It has a leakguard core feature that effectively absorbs fluid quickly and stretchy leg barriers that is effective in preventing leaks.

The diaper locks moisture away and doesn’t wick when pressure is applied, so your baby stays dry even after soiling the diaper. Its stretch tabs are elastic and adjust well to your active toddler. Even though it comes at a very affordable price, you still get the best quality for your baby.

Many moms are happy with Luvs and are sharing how they never experienced leaks or blowouts with this diaper. They even say that these diapers are comparable to more popular brands but at a very affordable price. So, if you want an excellent diaper for a friendly price, Luvs is a good choice.


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Huggies Little Movers Size 6 Baby Diapers

Huggies Little Movers is an ideal diaper for active babies who are more than 35 pounds. It has cloth-like softness with best-fit feature which is very comfortable while keeping in place during play time.

This was inspired by the shape of babies so it has a contoured figure that gives maximum coverage and leak protection while your baby is active. Its SnugFit waistband is designed to stay and adapt to your baby’s movement.

It has a DryTouch liner that absorbs moisture and wetness upon contact to provide the utmost comfort and dryness to your baby. It also has a Leak Lock feature the wicks and keeps wetness in for up to 12 hours of protection. Lastly, it has a wetness indicator so you can easily tell when baby needs a change.

Many moms love Huggies Little Movers and how quickly and effectively it absorbs liquids. It keeps wetness in even though the baby is very active and there are also no leaks when used at night just like these top overnight diapers.


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Wrapping up the Diaper Sizes by Weight

Knowing the different diaper sizes by weight is the best way to know which one will best fit your baby. But that is just the beginning because there are other factors to consider such as baby’s body build. If you are a first-time parent, following the manufacturer's sizing chart is the best option.

As you become more experienced with diapers and become more aware of diaper sizes by weight, you will soon discover what the best one is for your baby. You’ll avoid getting the wrong size and you’ll be able to have a perfectly fitting diaper that doesn’t give you leaks and blowouts.

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