Indications:Suitable for male & female,right leg & left legSevere ligament sprainDislocation, fox after surgery, can replace plasterAnterior and posterior cruciate ligament tearPosterior 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.