Childrens - US Costume Size Chart

Chest Waist Hip Height Weight
XS (4-6) 25" 24" 26" 52" up to 60 lbs
S (6-8) 27" 24" 28" 55" up to 70 lbs
M (8-10) 29" 25" 30" 58" up to 80 lbs
MP (8-10) 32" 28" 33" 55" up to 90 lbs
L (10-12) 31" 26" 32" 61" up to 90 lbs
LP (10-12) 33" 29" 35" 58" up to 100 lbs
XL(12-14) 33" 27" 34" 63" up to 100 lbs
Tween sizes are the same as the girls Large and Extra Large.

Childrens - International Size Chart

Height Weight
X-Small Up to 132.1cm Up to 27kg
Small Up to 139.7cm Up to 31.8kg
Medium Up to 147.3cm Up to 36.4kg
Large Up to 154.9cm Up to 40.9kg
X-Large Up to 160cm Up to 45.5
OS One Size Fits All.