Premium Material - Our swimming caps are made of high quality nylon fabric, soft and comfortable to wear, lightweight, exquisite workmanship with artificial sewing, not easy to fade and tear, durable and practical, can be used for a long time. Excellent Elasticity - These swimming hats feature good elasticity that they are suitable for most women or girls, flexible and easy to put on and take off, you may not feel too tight, providing you with a comfy experience. Good Protection for Your Hair - The practical and useful swim caps help reduce drag and keep your hair in place during swimming and keep them out of the sun when swimming in summer, no matter if you have long hair or short hair, you can use them Comfort & Safe - The thoughtful roomy design, Offers longer-haired swimmers higher comfort, a more Secure fit and a snag-free swim. Wide Applications - These swim caps can be applied for synchronized swimming, daily swimming and many other water sports, or bathing, etc., making your swimming activities more convenient. Size: Head circumference: 20.5 -21.3 inch/52-54 cm; Hat height: 7.08 inch/18cm