The Kid's ARV II Jr. sandal by Cobian features a water durable comfortable synthetic upper and a soft footbed with arch support. It also features a custom engineered drainage system.Cobian labels these sandal sizes as 10/11, 11/12, 12/13, 13/1, 1/2, 3/4, 5, and 6. To order a 10/11, select size Toddler 10. To order a 11/12, select size Toddler 11. To order a 12/13, select size Toddler 12. To order a 13/1, select size Toddler 13. To order a 1/2, select size Youth 1. To order a 3/4, select size Youth 3.