Reddie® Brace Knee Brace Small Wraparound / Hook and Loop Strap Closure 15-1/2 to 18 Inch Circumference Left or Right Knee (370145_EA) 1/EAThis black knee brace is suitable for individuals with a variety of injuries and ailments to provide adequate protection. The neoprene wraparound design and strap tabs allow for ease of use. Posterior strap adjustment allows for one time adjustment. Its removable dual axis polycentric hinges provide additional support and protection. Open popliteal helps minimize sweat. Take your measurements 6 inches above mid patella: Small is for 15 1 2 to 18 inch