Snorkeling Fins Foot Flippers For Swimming, Kids XXXS, NWT. Unique design improves the comfort of your feet when swimming and also increases the traction of water. Helps you release more foot strength when swimming, making swimming more effortless. Suitable for swimming pools, leisure swimming, snorkeling and swimming training. Does not need to be readjusted during use. XXXS is for foot 7" long or Kids shoe size 10-11. New with tags, retails for $29.