Care Instructions: Hand wash with mild soap in warm (not hot) water. Rinse well and air dry. Do Not: Machine wash, tumble dry, dry clean, or use bleach or fabric softeners. Size Selection: Measure circumference around mid-section of knee joint. Size: SM/M: 11-15 in; 27.9 - 38 cm. L/XL: 16-20 in; 40.6 - 50.8 cm. Wear Instructions: Starting with the wider end, slide the support up the leg and over the knee. 2. Ensure that the woven area is at the front of the knee.