Size Specification - Inner Diameter: 8.3'' . Outside diameter: 20.5''. Leg hole: 5.5". Double safety valve, double chamber design, more solid support. We have specially designed the baby seat to prevent the baby from slipping or rolling over when swimming. Baby Pool Float - The baby swim ring is suitable for babies aged 6-36 months / 0.6-3 years,Available weight: 6-16kg, 12-38 lbs; The swim ring should be used under adult supervision. Also with free repair patch, so convenient to use. Safe Material - The baby pool boat is made of soft and thick PVC material, non-toxic ink printing, skin-friendly. to baby; Durable and strong. Cute Design - The cute design of the toddler float with a smooth leg hole for baby to sit on, can help your baby exercise leg muscles and the safe swimming circle will stimulate learning and the baby's early growth, will make him love swimming and exercise physical coordination. TIPS - This baby float can only be used in shallow water and should be under the supervision of adults, do not touch it with anything sharp; baby usually does some unexpected actions, please don't let your baby swim alone.