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

SizeChestWaistHipsHeightWeight
Newborn(0-6)17-1818-191823-2612-16lbs
Infant (6-12)18-1918-191926.5-29.512-20lbs
Infant (12-18)19-2019-2019-2028-3220-26lbs
Toddler (2T)20-2119-2020-2133-3627-30lbs
Toddler (3T-4T)22-23.520-2222-2337-4334-38lbs
Toddler (4-6)2623.52643-49.536-47lbs
Toddler (5T-6T)2623.52643-49.536-47lbs
Medium (7-8)26.524.527.550-53.548-60