What Size Diapers Do Newborns Need?

Wondering what size diapers you need to buy for your newborn? Get all the info you need on newborn diaper sizes, including how many you’ll need and when to size up.

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When your baby is first born, they will need a small size diaper. Newborn diapers are designed to fit babies up to 10 pounds. If your baby is born above this weight, you may need to start with a size 1 diaper.

You will know it is time to move up to a bigger size when the diaper starts to feel snug or uncomfortable on your baby, the leaks become more frequent, or you notice red marks on your baby’s skin caused by the elastic in the diaper.

Most brands of diapers offer multiple sizes so that you can find the perfect fit for your baby as they grow. Below is a general guide of what size diapers babies need and when you can expect to need to move up to the next size.

Newborn: Up to 10 pounds (4-5 kg) Size 1: 8-14 pounds (4-6 kg) Size 2: 12-18 pounds (5-8 kg) Size 3: 16-28 pounds (7-13 kg) Size 4: 22-37 pounds (10-17 kg) Size 5: Over 27 pounds (12+ kg) Size 6: Over 35 pounds (16+kg)

How Many Diapers Does a Newborn Need?

A newborn baby will go through about 10 diapers a day, so you’ll need to have enough on hand. Once your baby starts sleeping through the night, you can expect them to use fewer diapers.

You’ll also want to consider what size diapers to buy. Newborns generally need smaller diapers than older babies, so you’ll want to start with a smaller size. As your baby grows, you can move up to a larger size diaper.

What Size Diapers Do Newborns Need?

Newborn babies will go through about 10 diapers a day, which means you will need to restock your diaper supply frequently. It’s important to have the right size diaper for your newborn, as a too-big diaper can cause leaks and a too-small diaper can be uncomfortable.

Most newborns will need size 1 diapers, but sizes vary by baby. The best way to determine what size diaper your newborn needs is to check the fit when they are wearing it. There should be no gaps around the legs or waist, and the diaper should not be overly bulky. If you are unsure about what size to buy, you can always ask your pediatrician for guidance.

Pampers Swaddlers are a good option for newborns, as they are designed to fit snugly around your baby’s waist and legs. Huggies Little Snugglers are also a good choice, and they come in smaller sizes for smaller babies. Whatever brand you choose, be sure to buy diapers that are specifically designed for newborns — these will provide the best fit and absorption for your little one.

How to Choose the Right Size Diaper for Your Newborn

There are a few things to consider when choosing the right size diaper for your newborn baby. The most important factor is weight — you’ll want to make sure you choose a diaper that will be comfortable and provide a good fit for your baby’s weight.

You’ll also want to take into account the type of diaper you’re using. Some diapers, like cloth diapers, come in different sizes based on weight, while others, like disposable diapers, only come in one size.

Finally, you’ll want to think about how often you plan on changing your baby’s diaper. If you plan on changing it frequently, you may want to choose a smaller size so that it’s easier to put on and take off.

The table below provides guidance on what size diaper to use for different weights:

Weight (lbs) Size Diaper
5-8 Newborn or Size 1
8-14 Size 1 or 2
12-18 Size 3
Over 18 Size 4 or 5


After doing all this research, we’ve come to the conclusion that newborns need size 1 diapers. Size 1 diapers are designed for babies who weigh between 8 and 14 pounds, and they should fit most newborns snugly.

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