Offers immobilization and support for mild sprains/strains of the shoulder area. Helps keep shoulder and arm in a neutral position. Adjustable padded straps for height adjustment. Support the arm and carries the weight across the back and shoulder Sizing Measure length of forearm Small 25.4 - 29.2cm (10 - 11 1/2) Medium 29.2 - 36.8cm (11 1/2 - 14 1/2) Large 36.8 - 43.2cm (14 1/2 - 17) X-Large 43.2 - 48.3cm (17 - 19)OPPO