Baby Clothes Size and Age Chart

Mother holding baby boy (9-12 months), shopping for clothes — Ann Intrieri Paz/The Image Bank/Getty Images

Updated on 07/14/17

Buying baby clothes is a lot like playing the lottery; you hedge your bets on a number, and hope it's the right one.

But it doesn't have to be that way. While it's true that babies grow really fast, it is possible to buy clothes for them that will fit - at least for now. Use our size and age chart to help determine what size you should buy.

Remember: when in doubt, make your purchase based on weight and height rather than age! It's always safe to go one size bigger, except in the case of baby sleepwear.

US Size and Age Chart

Age/Size	Weight	Length	Bootie/Shoe Size	Sock Size
Newborn	Up to 7 lbs	Up to 17"	N/A	N/A
Up to 3 Months	7-12 lbs	17-23"	3	Up to 6 Months
3-6 Months	12-17 lbs	23-27"	4	Up to 6 Months
6-12 Months	17-22 lbs	27-29"	5	6-12 Months
12-18 Months	22-27 lbs	29-31"	6	12-24 Months
18-24 Months	27-30 lbs	31-33"	7	12-24 Months