Perfect for Kids: Kids eyeglass strap length is 8.46in, as high elastic it can be stretched up to 15.7in, suitable for the eyeglasses leg frame width 8 - 16 mm, Perfect for kids or toddler use, but also suitable for adults. If your glasses with thick leg, please pull it through the strap.The strap is flexible, if feel tight please stretch it first. Anti-Slip: With ergonomic design, the glasses straps are easy to wear, comfortable for all day wear. keep your glasses in place, no slipping or breaking any more. Silicone Sports Soft Silicone Material: Our glasses bands are all made of silicone material, high elastic, flexible and durable, adjustable and comfortable to wear, safe to skin, hard to break, perfect for daily wear and exercise wear. Assorted Color: kuou kids glasses straps and ear hooks are in 10colors: red, orange, yellow, blue, brown, purple, pink, black,white, dark blue, colorful straps will help your kids to wear glasses, also great fun to use the different colors to match outfits,cute gifts. Widely Used: The silicone glasses straps are suitable for anyone who is tired of pushing his glasses up every time, especially great for indoor outdoor sports exercises, such as running, basketball football games, riding, skiing and so on.