Pro Slip-on cloth shin instep for Muay Thai, MMA, Kickboxing, stand up New and Improved design with divided 2 piece of padding on instep are for better movability of your feet, multi-layered foam composite padding specifically designed for full contact sports, Constructed of machine washable surgical elastic material, 2-layer foam padding provides excellent protection. SHIN area length: X-Small 9 . Small 9.5 . Medium 10 . Large 11 . X-Large 12 . Size chart: X-Small fits up to 90 lbs (Height 39 to 47). Small fits 90 to 125 lbs (Height 48 to 53). Medium fits 125 to 160 lbs. (Height 54 to 57). Large fits 160 to 185 lbs. (Height 57 to 511). XL for 185 to 200 lbs. (Height 511 to 61), XXL for 200 lbs and over. (Height 61 and over)