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

Size Chest Waist Hip Height Weight
0 TO 6 MONTHS 17.5 18.5 18 21 Up to 16 lbs
6 TO 12 MONTHS 19 19 19 23.5 16.5-22 lbs
12 TO 18 MONTHS 20 19.5 20 28 19.5-26lbs
3-4T 23 21 23 34 30.5-38lbs