Retains heat to reduce discomfort.Helps minimize swelling.Fits both right and left elbows.Sold individually. For elbow strains, sprains, bursitis and tendinitis. Black. Reversible. Measure elbow at widest point. Fits both right and left elbows. Sold individually.To size, measure elbow at the widest point.SizeMeasurementSmallMediumLargeX-Large7" - 9"9" - 10"10" - 11"12" - 13"