Baby sizes: which size at what age?

One of the most frequently asked questions from new parents is undoubtedly: which clothing size does my baby need? It may seem simple, but you soon discover that not every baby grows at the same pace. Some babies wear size 62 when they are two months old, while others already need size 68 by then.

That is why it is important to know that age is always only a guideline. Your child’s length and build ultimately give the best indication. In this guide, we’ll help you get started with the most common baby sizes and share some useful tips for baby registries and purchases.

Why don’t baby sizes always match age?

Baby clothes are usually sized according to a child’s body length. For example, size 62 is designed for babies about 62 cm tall.

Because babies all grow differently, it is perfectly possible for two babies of the same age to wear different sizes.

That is why we often advise parents not to look only at the age on the label, but especially at their child’s length.

What size does a newborn need?

Size 50

Average age: birth to about 1 month
Length: about 45-50 cm

Size 50 is often bought for the first days or weeks after birth. However, not all babies wear this size for long. Some babies are born longer than 50 cm and outgrow it quickly.

That is why we often advise not to buy too many clothes in size 50.

Size 56

Average age: 0-2 months
Length: about 51-56 cm

This is often the size worn the longest right after birth. Many parents therefore stock up on enough bodysuits, pajamas, and comfortable outfits in size 56.

For baby registries, this is usually a safe choice.

Size 62: the first growth spurt

Size 62

Average age: 2-4 months
Length: about 57-62 cm

Around this period, many babies grow noticeably fast. Clothes are changed more often and parents often notice that the smallest sizes suddenly no longer fit.

Size 62 is ideal for:

• bodysuits
• pants
• sweaters
• sleeping bags

Size 68: an active baby

Size 68

Average age: 4-6 months
Length: about 63-68 cm

Your baby is becoming more and more mobile and starts actively exploring the world. Comfortable clothing becomes even more important, especially once rolling over and turning around become part of everyday life.

Many parents also start buying seasonal clothing in this phase because they can better estimate which size their child will wear in summer or winter.

Size 74: sitting and crawling

Size 74

Average age: 6-9 months
Length: about 69-74 cm

During this period, many babies learn to sit up on their own or start crawling.

Sturdy pants, comfortable leggings, and soft sweaters are popular in this size. Because children move a lot during this phase, plenty of freedom of movement is important.

Size 80: on the way to first steps

Size 80

Average age: 9-12 months
Length: about 75-80 cm

By the end of their first year, many babies become real explorers. They pull themselves up, take their first steps, or explore the whole house by crawling.

Clothes should not only be comfortable, but also practical for active little ones.

Baby size overview table

*Ages are always indicative.

Which sizes are best to add to a baby registry?

A common mistake is that parents mainly put small sizes on their baby registry. Family and friends also often buy clothes in size 50 or 56 spontaneously because they look so cute.

As a result, many parents end up with an abundance of small sizes, while larger sizes are missing.

That is why we recommend also providing enough clothes in:

• size 62
• size 68
• size 74

That way, you’ll still have new outfits ready a few months after birth.

Is it better to buy by size or by age?

If you are choosing between two sizes, it is often wise to go for the larger size. Babies grow quickly and slightly roomier clothes are usually worn longer.

Especially for:

• sweaters
• pajamas
• sleeping bags
• coats

a size up often does no harm.

What about premature babies or larger babies?

Not every baby follows the average growth curve.

Premature babies sometimes need size 44 or special preemie clothing. On the other hand, some babies are born longer than 54 cm and wear size 56 or even size 62 almost immediately.

That is also why your child’s length remains the best guide in the end.

Conclusion

Baby sizes are a useful guideline, but every child grows at their own pace. So don’t look only at the age on the label, but especially at your baby’s length and build.

For baby registries and purchases, it is smart to provide different sizes. That way, you are prepared for growth spurts and your child can keep moving comfortably at every stage of development.