["NOTE:We have upgraded the stainless steel ring it wont rust or tear please feel free to contact us if you have any problems we offer a full refund service! S (Child) Size Foam dimensions ：17.71 length 6.29”width" [Best Swim Floating Belt]:US Patent Pending - Hikeen Swim Belt solves the problem of upward movement of the waist belt during swimming by adding Strap Between Legs to ensure that the belt will not slide thus avoiding discomfort to the body and pressure on the lumbar thoracic cavity which makes the body feel freer and more comfortable when swimming. [EASY LEARNING SWIM BELTS FOR KIDS] : Designed for children aged 3 to 12 years old the swim belts provide buoyancy support to help a child or teenager maintain their balance and learn to swim quickly helping to teach your child to adapt to swimming move freely and play alone by the poolside making it easier and safer to learn to swim. [QUALITY FABRIC] Made of high quality diving material with EPE pearl cotton material skin-friendly and comfortable. With removable lining design for easy cleaning and carrying the seams will not wear out. [Adjustable Straps and Buckle]Free adjustable swim belt S (Child) size fits 23.62" M (Adult) size fits 45.5" Firm buckle ensures it will not fall off by itself unlike other belt buckle that can come loose accidentally.S (Child) Size Foam dimensions ：17.71\\ length 6.29”width [MULTIFUNCTIONALITY] Our swim belts for kids allow kids to focus on the many skills involved in swimming suitable for a wider range of use scenarios such as swimming pools waterparks beaches and more. If you are not satisfied with anything please contact us and we will solve your problem within 24 hours.]