Important Measurement Trunk Length Waist to Ankle (shoulder to crotch) (along outside of leg)XS 4-6 19"-21" 22"-26"Small (6X-8) 22"-23" 27"-30"Medium (9-10) 23"-25" 30"-33"Large (12-14) 26"-27" 34"-37 XLarge (16-18) 28"-30" 38"-41"