Foam Swim Rings - Swimming Pool Life Ring Buoy with Perimeter Rope (Red) Safety foam life preserver ring for kids adlut ,high quality firm poly-foam . Child size 19.8"/50cm 27cm/10.9" 7oz/200gram It only can be used at swimming pool ; NOT for lake, river or ocean . This foam ring buoy adds safety to any pool area. Its soft surface will withstand years of sun and weather. No pool should be without its own emergency life saver bouy. Child size suitable for: 3-10 years old children .