Elbow Support Women & Men: Our tennis elbow strap comes in S (7.8”-9.8”), M (9.8”-11.8”), L (11.8”-13.8"), and XL (13.8”-16”). Measure the circumference at the centre of your elbow to find your fit (see image guide). Go a size up if you're near the upper limit, or size down for a tighter fit. Comfortable Elbow Strap: The arm support's semi-permeable fabric is breathable and sweat-wicking so you stay dry and comfortable while working out. Double non-slip waves at the top edge keep it securely in place, and it can be worn on either the right or left arm. Circulation Booster Sleeve: By boosting blood circulation to the elbow area, the compression arm sleeve accelerates natural recovery for your whole arm. Protective Elbow Arm Bands: The elbow sleeve's 3D compression knit supports and restricts your elbow’s movement without loss of flexibility, protecting it during exercise and lowering your risk of future injuries. Tennis Elbow Brace for Elbow Joint Pain Relief: Get back to doing what you love with VITTO elbow braces, giving you pain relief from tennis elbow, golfers elbow, tendonitis, arthritis, ligament damage, sprains, and strains.