Details: Official Ankle Brace of USA Volleyball The Ultra Zoom ankle brace is the only brace built for performance The Performathane(R) soft shell forms to you, allowing your ankle to move in all the natural ways Can prevent any excessive movement that may cause an injury The Ultra Zoom is on your ankle in seconds, protects continuously for hours and lasts for multiple seasons One year guaranteed warranty Sizing: Measure around your ankle with a tape measure and reference size chart to determine your correct size S/M 10.5"-14" L/XL 14"-16" If you are measuring right at 14" we recommend going with a S/M.