Feature - 2-flex stays increase medial/lateral support - 4 ways weaving for better comfort - Retains body heat to warm the joint Applications - Mild sprain - Mild pain - Arthritis - Warmth SIZE : Measuring around the knee joint S 12 - 14 (inch) 30.5 - 35.6 (cm) M 131/2 - 15 (inch) 34.3 - 38.1 (cm) L 141/2 - 161/2(inch) 36.8 - 41.9 (cm) XL 16 - 18 (inch) 40.6 - 45.7 (cm) What's in the Box : 1piece x Advanced Elastic Knee Support