One size fits both feet and up to 11" in feet arch circumference. Protect the ankle and minimize the risk of injury. Perfect for chronic and acute ankle injury symptoms. Helps relieve pain and provides comfort related to plantar fasciitis. Open heel design allows wide range of motion during activity and still provide support for the ankle tendons and joints. Ideal for indoor and outdoor sports that need strain ankles during exercise. Breathable neoprene material retains heat and prevents skin irritation. Comfortable, flexible, durable and washable. Speed up the healing phase, as it provides just enough and needed support for ankle and foot through compression on the tendons where you need it the most. Fabric: OK cloth size: 29*21cm（1 inch≈2.54cm） Colour: Black Package includes: 1pcs or 1 pair