Review on Optimized Kids Mermaid Monofin Swim Fin by FINIS by Sean Purnomo

I tried this mermaid story on my two daughters (6 and 8 years old) and her cousin (7 years old), NONE of them keep the fairy tale going . It was either too loose and slipped off immediately, or it was too tight for her feet. I think the reason they struggled was because their legs had to share a compartment. If the strap that holds the legs loosens it is almost impossible to reattach it without tools, which would be very difficult in the pool. I would not recommend this product at all. I would recommend a fairy tale at the following link: http://www.amazon.com/gp/product/B00YBYAQZK. We have exactly the opposite problem with it.