Industry standard for baby and toddler apparel is to use age as the size, but it is important to measure your birdee(s) as it is possible to have an older birdee that still needs a smaller size, or conversely a younger birdee that needs to size up. For example, a birdee that is 14 months may still be wearing size 6-12 months given her measurements. If when measuring your child falls into two different sizes between weight and length (i.e. 24 lbs and 32'') then it is best to size up to ensure a better fit.

 

Baby and Toddler Size Charts

Baby Birdees 0-24 Months
 
US Size Age Weight 
(in lbs.)		 Length 
(in inches)
NB Newborn 5-8 Up to 20
3M 0-3 Months 8-12.5 20-23.5
6M 3-6 Months 13-16.5 24-25.5
9M 6-9 Months 17-20.5 26-27.5
12M 9-12 Months 21-23.5 28-30.5
18M 12-18 Months 24-26.5 31-32.5
24M 18-24 Months 27-30 33-34.5
 

 

 

Girl Birdees 2T -3T
 
US Size Age Weight 
(in lbs.)		 Length 
(in inches)
2T 2 Years 24-29 33-35
3T 3 Years 29-33 35-38
 

 

 

Boy Birdees 2T-3T
 
US Size Age Weight 
(in lbs.)		 Length 
(in inches)
2T 2 Years 24-29 33-35
3T 3 Years 29-33 35-38
 

 

* This size chart provides general guidance to your baby and toddler clothing sizes based on age, weight, and length.  Each brand typically has its own size specifications.  If you ever have a question about what size to order, please contact us and we will be glad to help.