SIZE CHART: S: knee mid patella circumference 12-13inch/30-33cm M: knee mid patella circumference 13-14inch/33-36cm L: knee mid patella circumference 14-15inch/36-38cm XL: knee mid patella circumference 15-17inch/38-43cm Elastic High Quality NeopreneMaterial The volleyball knee pads are made of superior elastic fabric by an exquisite weaving technology, ensuring a long-time use. Comfortable, soft, breathable and flexible, they can wick away the moisture quickly and ensure a wearing of all day comfort. Ergonomic Design Easy to wear and take off, the elastic cuff keeps the knee sleeves from rolling, sliding or slipping down during the sports. Besides, its good elasticity makes the pads suitable for different people's knee curves. Perfect GiftThis is the perfect gift for your relatives or friends. It can perfectly convey your care for your relatives and friends to them. Wide Application Our knee braces for women is perfect for dance, volleyball, basketball, football, wrestling, running, athletics, jogging, cycling, weightlifting, squats, skiing, tennis, golf, walking, hiking and yoga. The knee pad is a great knee health defender to make you enjoy the sports moment better.