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Baby Clothing Sizes Compared by Brand

Buying baby clothes is not as straightforward as it seems. You’d think you could go by the tags and if it says it fits a baby that is 3-6 months, it would fit your 4 month old. Or at least, you’d know if your baby is a bit bigger than average, you could always size up to a 6-9 month, and that would surely fit. Nope, not necessarily!

Just like adult clothes, sizes run differently between different brands of baby clothes. Your baby will probably have one or two bizarre wardrobe inconsistencies, like a size 3M t-shirt that still fits when your baby wears mostly 9M clothing in other brands (true story). It’s best to know the general consensus of how a brand size runs before buying, or better yet, buy in person where you can physically look at the garment yourself. This list can give you an overview of some common baby clothes brands and how they typically run.

Always consider the material and how you plan to wash it too—cotton garments will most likely shrink some in the dryer. In my opinion, running “a little big” is not a bad thing. In most cases, if you are between two sizes, sizing up is safest.

Baby Clothing Sizing by Brand

BabyGap runs fairly true to size but sometimes a little wide.
Example: A size 3M BabyGap t-shirt fit until my baby was in a 6-9M size elsewhere. It was still wide enough, it just got too short eventually.

Burt’s Bees baby clothes can vary from one piece to the next, sometimes very narrow, but often quite long for the size too.
Example: Have to show y’all a picture of this one! The pants on the left are BOTH Burt’s Bees pants in size 3-6M. The pair on the right is Carter’s in the same size. Disclaimer: I love Burt’s Bees styles though!

Two pair Burt’s Bees 3-6M pants. \ Carter’s 3-6M pants.

Carter’s baby clothing (Carter’s Just One You, Child of Mine, Precious Firsts, and Simple Joys by Carter’s) runs true to size. It is often (unofficially) considered the “average” to compare other brands to.

Cat & Jack baby clothes run fairly true to size.

The Children’s Place baby clothing runs a little small.

Cloud Island (Target) baby clothes run fairly true to size.

Crazy 8s baby clothing usually runs a bit small.

Disney baby clothes typically run small.

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Check out how this Ultimate New Mom & Baby Checklist!

Garanimals (Walmart) baby clothing runs fairly true to size except often a bit on the short side.

Gerber baby clothes run quite short. Size up a whole size. However, they often also fit wide.

Gymboree baby clothes run a bit large and wide.

Hanna Andersson baby clothes run true to size, maybe a tad large. They size by centimeters (size 50, size 80, etc.) so check their guidelines.

H&M baby clothing runs fairly true to size or a little big.

Jessica Simpson baby clothes run a bit long.
Example: A 3-6 mo romper fit too long on my girl until she was in 9M in most other clothes.

Jumping Bean baby clothes (Kohls) run a bit large.

Nike baby clothes may run a bit long.

Old Navy baby clothes fit fairly true to size, sometimes a bit short.

OshKosh B’Gosh baby clothing runs fairly true to size.

Ruffle Butts baby clothes run a bit small.

Tea Collection baby clothes run fairly true to size.

Zara baby clothes run a bit small.

I hope this list makes it easier to get started shopping for baby clothes, mama!

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