The Royal Stretch Prosthetic Wool Sock Size RS3 Med.10"/12"-See Chart The Royal Stretch (wool) is designed to offer a form fitting prosthetic sock with the natural properties of virgin wool. This creates a fuller, fluffier sock for increased cushioning and softness. The round toe is engineered for a "knit-to-fit" feeling with consistent memory and excellent stretch. The super wash wool, if properly cared for, stays soft and resists shrinking. Latex FreeStretches in length and widthRound ToeForm FittingWash and wearMost sizes fit Symes and PTB patientsRoyal Distal Opening for suspension systems See picture of size chart