When trying to decide between two sizes, choose the larger size for a better fit.

SizeChestWaistHipsHeightWeight
XS (3-4T)23212341up to 40 lbs
Small (4-6)25232545up to 50 lbs
Medium (8-10)27.5242956up to 65 lbs
Large (12-14)32263460up to 90 lbs
XL (14-16)33.52736.562up to 115 lbs