"If ankle pain, strains and weakness are holding you back, get targeted, super effective support with the OS1st AF7 Ankle Bracing Sleeve Left. You'll be impressed by how this ankle brace helps support and stabilize your strides, while also offering medical grade compression to reduce swelling and boost circulation. You'll love the comfortable, breathable fit, and you're sure to appreciate the easy wear versatility of comfortably wearing the OS1st AF7 Ankle Bracing Sleeve in all types of shoes.Size S M L XL  Arch Circumference 5-8"" 7-10"" 9-13"" 11-15""  Men's Shoe Size 3-5.5 6-9 10-13 13.5-15  Women's Shoe Size 4-6.5 7-10.5 11+  "