Title Boxing Title Wizard Style Stock Boxing Trunks Small: 19.5" Length, Weight Up to 112lbs, Waist 26"-28" Medium: 20.5" Length, Weight 112lbs to 132lbs, Waist 30"-32" Large: 21.5" Length, Weight 132lbs to 165lbs, Waist 34"-36" X-Large: 22.5" Length, Weight 165lbs to Heavywt, Waist 38"-40" X-Large: 23.5" Length, Weight Super Heavywt, Waist 42"-44"