Size Tummy Leg Rise
Small 10 - 15 6 - 8 13
Medium 13 - 18 7 - 10 15
Large 15 - 23 10 - 14 17
Directions for measuring your child:
Tummy - Measure around the waist at the level of 1 inch below the belly button.
Thigh - Measure starting at the top of the leg at the hip - where the leg bends - then around through the crotch and back up to the top of the thigh.
Rise - Measure from 1 inch below the belly button down through the crotch and up to the 1 inch above your starting level.
(I recommend measuring the rise over a stuffed diaper).