The Mermaid Fin is a fun monofin pool toy ideal for young swimmers. The Mermaid Fin teaches a balanced dolphin kick while also allowing children to increase their confidence in the water. The Mermaid Fin comes with a comfortable TPR foot pocket and uses a quick-release foot strap so that feet can quickly be removed from the fin for safety. Ideal for children 12 and under, the Mermaid Fin fits shoe sizes male 1-6, female 2-7, Euro sizes 33-39. The Mermaid Fin should only be used under adult supervision.