M Unique knit design for precise compression where needed Open heel, easy to slip-on Style. Silicone Pressure Pads for increased comfort in the elbow Retains body heat and increases blood circulation, keeping flexible your muscles and articulation. Applies appropriate compression and reduces the possibility of a new injury in the affected area without limiting mobility. Available sizes: Size Inches Cms Small 9" - 10" 22.86 - 25.40 cm Medium 10" - 11" 25.40 - 27.94 cm Large 11" - 12" 27.94 - 30.48 cm