Size Guide

Little ones grow so fast, so we want ordering to feel easy. Here's our quick guide to finding the perfect fit. Every brand fits a little differently, so check the fit notes on each product too. When in doubt, size up. More room to grow is never a bad thing!

Baby sizes

Size Weight Height
Newborn up to 8 lb up to 21.5 in
0-3M 8-12.5 lb 21.5-24 in
3-6M 12.5-16.5 lb 24-26.5 in
6-9M 16.5-20.5 lb 26.5-28.5 in
9-12M 20.5-24 lb 28.5-30.5 in
12-18M 24-27.5 lb 30.5-32.5 in
18-24M 27.5-30 lb 32.5-34 in

Toddler sizes

Size Weight Height
2T 29-31 lb 35-36 in
3T 31-34 lb 37-38 in
4T 34-38 lb 39-40 in

Kids sizes

Size Weight Height
5 41-46 lb 41-44 in
6 47-52 lb 45-47 in
7 53-60 lb 48-50 in
8 61-70 lb 51-53 in
10 71-82 lb 54-56 in
12 83-95 lb 57-59 in

These are general US sizes. If your little one is between sizes, go by height first.

Fit notes by style

  • Bamboo zippies and sleepers: These run a little roomy. Order their usual size.
  • Pajamas: Kids' pajamas fit snugly on purpose to meet sleepwear safety standards. Size up if you'd like a looser fit or more growing room.
  • Smocked bubbles, dresses and rompers: These are true to size. Size up for a longer wear season.
  • Cotton knits and sweaters: These are true to size with a relaxed, cozy fit.
  • Waffle knit onesie: This one is sized in centimeters. 66 cm is about 6-9M, 73 cm is about 9-12M, 80 cm is about 12-18M and 90 cm is about 18-24M. It runs small, so size up if in between.
  • Family matching pajamas: Adult pants run relaxed. Most women size down one to two sizes.

Still not sure?

We're always happy to help! Send us a message through our contact page with your little one's age, height and weight, and we'll help you pick the perfect size. 💛