I used this for about two months when I injured my medial collateral ligament. I purchased it new and always wore knee socks before putting it on. Size: S All the included replacement parts are present and unused. For reference (wearer's measurements): 15 cm above the right knee: approx. 40 cm 15 cm below the knee: approx. 34 cm DonJoy Around the top buckle: 27 cm Around the bottom buckle: 24 cm The length can be adjusted with the Velcro straps. It has been used, so there are some minor scratches, but it's a product that costs 79,000 yen when new. Please understand that this is a used item. DONJOY 4TITUDE Size: Thigh circumference (cm) 15cm above the center of the patella XS 33～39 S 39～47 M 47~53 L 53～60 XL 60～67 3XL 67~75 4XL 75～81