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% .