Features: anatomical multi directional knitting for better fitting (four way stretch).uniform compression.simple pull on application.seamless tubular knitted.snug fit, retains body heat. Sizing details : measure circumference of leg 2 above ankle joint .Size inches cmssmall 7 8 17 20medium 8 9 20 23large 9 10 23 25x-large 10 11 25 28