Mares Allegra Junior Adjustable Snorkeling Fins for Kids Soft rubber foot pockets make these fins easy to wear barefoot, or with Sand Socks for extra protection during longer snorkel trips Adjustable heel straps mean that the fins can be used year after year as kids grow Perfect for keeping at the lake house or pool for guests FREE Mesh tote bag included! Size small fits little kids shoe size 9-13, Size large fits kids/youth shoe size 1-4 .