Size: Large Fits a 19 -21 Leg Circumference Measure 4 above center of knee cap. * Unlike traditional compression garments the IMAK Compression Arthritis Knee Sleeve is designed with all-day comfort in mind. * This makes it the ideal choice for people living with chronic pain from arthritis fibromyalgia overuse or other conditions. * The Sleeve provides mild compression for warmth and helps increase circulation which ultimately reduces pain and promotes healing. * Made of soft breathable cotton material it is comfortable enough to wear all day and night. * Tri-band technology holds sleeve securely in place and helps prevent rolling. * Effective non-invasive arthritis relief. * Provides mild compression to help control or decrease swelling of the joints. * Cotton material allows skin to breathe and keeps hands dry. * Comfortable to use all day and night.