For two decades, orthopedic surgeons, rheumatologists, podiatrists, family-practice physicians, physical therapists and their patients, professional athletes, and active individuals have praised our Knee Strap. Why? Shortly after initial usage, it provides many individuals with a marked reduction in the pain and discomfort caused by various knee disorders -- chondromalacia patella, Osgood Schlatter’s Disease, runner’s and jumper’s knee, some forms of arthritis, and knee degeneration -- while, at the same time, allows them to return to their normal activities with increased mobility. Cho-Pat’s Original Knee Strap stabilizes and tightens up on the kneecap mechanism by applying pressure upon the patellar tendon below the kneecap. This compression reduces or eliminates inflammation and helps prevent knees from giving out. Sizing: Based On Circumference Below Patella Note: If you are between sizes, we suggest you order the smaller size. For the Shin Splint Compression Sleeve and all the Knitted Compression devices, we suggest ordering a size larger. Extra Small - Tan Less than 10 in.; Less than 25 cm. Small - Tan 10-12.5 in .; 25-32 cm. Medium - Tan 12.5-14.5 in .; 32-37 cm. Large - Tan 14.5-16.5 in .; 37-42 cm. Extra Large - Tan 16.5-18 in .; 42-46 cm. Super Large - Tan 18-21 in .; 46-53 cm.