Note: Please allow 1?2cm error due to manual measurement. Thanks for your understanding. specification: Item Type: Shoulder Brace_x000D_Material: Composite fabric, aluminum strip_x000D_Size of S: Approx.31 x 22cm / 12.2 x 8.7in_x000D_Size of M: Approx.34 x 23cm / 13.4 x 9.1in_x000D_Size of L: Approx.36 x 25cm / 14.2 x 9.8in Features: 1Specially designed to provide excellent arm support and fixation and relieve the pain of arthritis. 2Wide range of uses, suitable for upper arm fractures, humeral fractures, wrist fractures, wrist sprains, etc. 3With adjustable shoulder straps, you can easily adjust the length and elasticity of the shoulder straps. 4Made of high?quality composite fabric, breathable and comfortable, even if you wear it for a long time, you will not feel discomfort. 5Using hook and loop fasteners, which makes it easy for you to put on and take off. PackageList: 1 x_x000D__x000D_ShoulderBrace