Knee Length T.E.D. anti-embolism stockings are available in six sizes and two lengths, fitting a calf circumference of up to 26". T.E.D. anti-embolism stockings are clinically proven to reduce DVT up to 50 percent and to promote increased blood flow velocity in the legs 138 percent of baseline by compression of the deep venous system. Features and Benefits T.E.D. Anti-Embolism Stockings feature the following: Defined heel pocket to ensure correct placement Inlay circumferential knit, helping to provide one way horizontal stretch Toe opening allows easy inspection of the skin and pedal pulse