The knee pad is suitable for women, men, boys, girls, juniors, adults. Its good elasticity makes the knee support perfect for different people's knee curves. Ergonomic design, super lightweight, the knee sleeves provide more freedom of movement. An ideal knee protector for outdoor sports. The knee pads are made with extra-durable elastic fabric by an exquisite weaving technology, comfortable and soft. Thickened anti-collision sponge pad provides continuous guard for your knees. The dance knee pads prevent knee injuries during outdoor activities. They help provide more freedom to playful kids. Perfect for arthritis, osteoarthritis, tendinitis, meniscus tear, ACL, MCL, PCL, post surgery pain, sports injuries and many more knee related issues and pains. S: For children Under 13 years old. M: For people whose weight is 40-65 kg. L: For people whose weight is 65-90 kg. 1. Use a flexible tape measure. 2. Stand up and straighten the leg. 3. Measure 3.94" above the knee.