pack includes 7 pairs of boxer-brief underwear elastic waistband with repeating logo fly front sits at waist fitted hip and thigh hits mid-thigh XS = 5-6 yrs. (22 waist) S = 6-8 yrs. (22-23 waist) M = 8-9 yrs. (24 waist) L = 9-11 yrs. (24-25 waist) XL = 11-12 yrs. (26 waist)machine wash according to the care instruction label polyester 40% cotton 60% . Best Holiday gift for Kids , perfect Boxers for Christmas!