Economy Knee Immobilizer is durable blue duck canvas laminated to a foam liner. Sewn-in aluminum medial/lateral stay and three contoured posterior stays. Loop-lock contact closure. Hand wash, air dry. Fits left or right.Suggested code: L1830.Sizing: Measure circumference of leg 4" above patella.Small: 13" - 16"Medium: 16" - 19"Large: 19" - 21"X-Large: 21" - 24"XX-Large: 24" - 27"