Top King Shin Guard Protector for Protection in Muay Thai, Boxing, Kickboxing, MMA (Black/Black,S) Specially designed with extra attention paid to the areas around the lower leg muscles and under the knee caps to offer more protection than other shin guards. Hook and loop closure for for a secure fit. Size S - Length (does not include feet) 15" (38 cm) Size M - Length (does not include feet) 16" (40 cm) Size L - Length (does not include feet) 16.5" (42 cm) Size XL - Length (does not include feet) 17" (43 cm)