The Anklizer Low Ankle Walker by Bird & Cronin is a fixed ankle walker that was built to give support and protection to foot and ankle injuries like stress fractures, diabetic ulcers and post-op bunion surgery wounds. Features a high-quality, foam liner with ultra-plush foam plus soft inner material for excellent comfort. Generous cut of the walker liner, accomodates a wider range of calf sizes. Liner has a contoured design to provide a more anatomical fit. Additional padding at the achilles tendon and heel for superior comfort. Wider foot area provides a more comfortable fit. Light-weight design has metal reinforced uprights for additional strength. Complete application instructions included. SMALL size fits mens shoe size 4-7 and womens shoe size 5-8, 11" tall. MEDIUM size fits mens shoe size 7.5-10 and womens shoe size 9-11. Overall dimensions 12'' tall. LARGE size fits mens shoe size 10.5 and up and womens shoe size 10.5 and up. Overall dimensions 14'' tall.