The Finis Kids Finz were specifically created for the learn-to-swim market that teaches young children and beginner swimmers. The benefit of using the Kids Finz as an instructional tool is to imitate the feel the child should be experiencing upon removal of floatation aids. The fins will lift the body via propulsion, teaching the child to establish the correct horizontal body position at the surface of the water - a position otherwise difficult to teach. Once the child has this foundation, learning is accelerated, allowing for further development of proper swimming technique. Toddler Finz fit shoe sizes K 6-10. Child Finz fit shoe sizes K 11-2.