Indications: Suitable for male & female,right leg & left leg Severe ligament sprain Dislocation, fox after surgery, can replace plaster Anterior and posterior cruciate ligament tear Posterior cruciate ligament, medial collateral ligament and soft tissue injury ???Measure Note??? Measure the size S/M of your leg and measure up and down position of the 8.66 " with your knee as the center. Measure the size M/L of your leg and measure up and down position of the 9 " with your knee as the center. Applicable size (recommended): SIZE S/M: Thigh circumference: 14.96''-20.47'' Calf circumference: 11.42''-17.32 '' The maximum circumference of the thigh circumference is 20.47'', The maximum circumference of the calf circumference is 17.32 '' SIZE M/L: Thigh circumference: 16.5 ''-21.3 '' Calf circumference: 13 ''-18.1 '' The maximum circumference of the thigh circumference is 21.3 '', The maximum circumference of the calf circumference is 18.1 '' IF YOU HAVE ANY PROBLEMS,CONTACT US ASAP.