CSZ1003: Features: -Knee brace. -Available in Small, Medium, Large or Extra Large sizes:. -Built-in patella stabilizer ring reduces patella movement to ensure proper and efficient motion of the knee. -Made with high quality neoprene, reinforced seams, and durable velcro fasteners. -Provides excellent support without sacrificing mobility. -Equipped with durable plastic stays on both sides of the knee. -Built-in patella stabilizer ring reduces patella movement to ensure proper and efficient motion of the knee. -Two durable velcro straps allow for a customized level of compression both above and below the knee. -Easily adjustable for customized support. -Designed and manufactured for the most demanding athletes and for everyday use. Measure the circumference directly around knee cap: -Small 12.5 - 14. -Medium 14 - 15.5. -Large 15.5 - 17. -Extra Large 17 - 18.5.