Oppo: Tennis Elbow Brace With Strap OP1080. Provides full support of elbow region in conjunction with reducing of the insertion of the extensor carpi radialis tendon. Adjustable compressive strap reduces tension in wrist and finger extensors during gripping. Made from breathable neoprene; cotton inside lining for extra comfort. Size: Measure around the elbow joint: 23.2-25.7cm Small, 26-28.3cm Medium, 28.6-30.8cm Large, 31.1-33.3cm X Large.