38/39 yards(internal length 23.5CM) 40/41 yards(internal length 24.5CM) 42/43 yards(internal length 25.5CM) 44/45 yards(internal length 26.5CM) 46/47 yards(internal length 27.5CM) 48/49 yards(internal length 28.5CM) Rubber sole 1.Lightweight and flexible just like socks,breathable and smooth fabric provide great freedom and comfortable feeling. 2.Quick-dry water shoes, ultra light weight smooth stretchy fabrics and easy slip-on design make it convenient to wear and take off. 3.Lightweight and compressible, easy to fold and carry when you go out. Wearable rubber sole protects your feet from being hurt by stone and other sharp objects. 4.Water shoes are choice for most outdoor activities, such as beach, swimming, swimming pool, boating, kayaking, hiking, running, exercise, jogging, yoga, cycling, fishing, beach volleyball, water sports, etc. Especially for family outings! 5.Our water shoes have various size suited for Mens or Womens. Provide various size available from 38/39 yards to 48/49 yards for Women and Men. Please refer to the SIZE CHART.