Description: The Knee Immobilizer 22 provides excellent support and immobilization for the knee. It is available in various sizes to ensure a proper fit. Sizes Available: S, M, L, XL Size Options: Select one based on the circumference of the knee: Size Inches CM Small 7.2-8.4 18-21 Medium 8.4-9.6 21-24 Large 9.6-10.8 24-27 XL 10.8-12 27-30