p Knee Support For arthritis knee conditions, minor sprains and strains Provides firm support for the maintenance of joint structures with gentle compression over the kneecap Increases healing and keeps joints and muscles flexible Measure around the knee joint. 11" - 13" 13" - 16" 16" - 18" 19" - 21" (28.6-33.7cm) (34.3-40.6cm) (41.3-47.6cm) (48.3-55.2cm) Small Medium Large /p