Large 11" to 12-1/2" (28 to 32cm) Allows greater functional use of the arm because the elbow is not totally immobilized. Made of 1/16" (1.6mm) perforated neoprene with a soft terrycloth liner. Circumferential design with an open proximal end is easy to put on and adjust. The Comfort Cool Ulnar Nerve Elbow Protector with Gel Pad provides protection and support for bursitis, ulnar nerve irritation, tendinitis, and post-surgical repair. Mold the precut, 1/8" (3.2mm) Prism splint insert to custom fit the elbow at the flexion limit. Design allows the elbow to move from full extension to the limited flexion position, protecting the ulnar nerve from damaging tension. Removable gel pad protects the vulnerable posterior elbow from painful bumps and pressure points. Includes thermoplastic insert, neoprene support and gel elbow pad. Hand wash and air dry. Latex free. If between sizes, choose the larger size.