The Fitted Polyester Casting Socks provide several sock sizes in three graduated lengths for use in obtaining molds for custom shoes, boots and ankle foot orthotic devices. The various sizes cover the broad range of applications needed by the practitioner to achieve the best possible fit and finish for their respective molds. SIZES: SIZE S. . . (W: 4 - 5 _ M: N/A) SIZE M . . (W: 7 - 10, M: 7 - 9) SIZE L . .. (W: 10 - 12 M: 9 - 12) SIZE XL. . . (W: N/A M: 12 - 15) Reduces casting time, Cure time in less then 5 minutes, More accurate then fiberglass rolls Virtually eliminates all wrinkling and provides excel, conformity to the foot and ankle contours, Glass-smooth finish is ideal for CAD/CAM Cutting strip and Channel tube included for safe and innovative removal