Band-fixed knee support, size M, 2 pieces Material: Polyester Excellent breathability and elasticity. Easy to fix with Velcro, so it doesn't slip easily. Size M Length 27cm (upper opening 16cm, lower opening 15cm) L Length 27cm (upper opening 17cm, lower opening 15.5cm) Other sizes, 2-piece sets, and other products are also on sale. Please see the following for other supporter products #shinchan's supporter #shoulder #knee #supporter