Right Size Medium Men 8-12 Women 9.5-13.5 Provides Moderate Support For Ankle Injury Prevention And Treatment Recommended To Help Prevent High Ankle Sprains Abnormal Inversion/eversion And Protection Of Ankles During Impact Sports Anatomical Contour For Proper Fit Sturdy Rigid Uprights With Circumferential Strapping To Help Prevent And Treat High Ankle Sprains And Inversion/eversion Injuries Bilateral Hinges For Natural Unrestricted Motion Heat Moldable And Trimable Foot Plate To Match Shoe Insoles Or Orthotics Available In Left Or Right Version