OA Knee Support (Neoprene) - J-08 is scientifically designed to provide counter force to correct varus or valgus thrust along with some offloading action. It helps to allay pain within a few weeks of use. It can also correct mild to medium varus/valgus deformity of the knee with prolonged use.Sizing:Small: Inches (14.7-17.2), CM (37-43)Medium: Inches (17.2-19.6), CM (43-49)Large: Inches (19.6-22), CM (49-55)XL: Inches (22-24.4), CM (55-61)XXL: Inches (24.4-26.8), CM (61-67)