Review on Long Floating Fins For Swimming And Snorkeling By FINIS – Use Size Chart For Accurate Sizing by Eric Broad

We love Finis flippers! We bought the orange/blue size for our five year old over a year ago. She has worn a toddler 10 shoe and they've fit fine. they've been roomy but she's an avid/strong swimmer and has had no problems keeping them on her feet while swimming. One year and a half later, her foot is only barely out of the 10's and almost in the 11's and this size is still perfect for her. One of the flippers did split just above the foot a couple weeks ago, but I think it's from repeated standing on the ends in the shallow end of the pool. For the price, after a year and a half, we were happy to quickly order a new pair and she's still swimming like crazy with them! (we also just got her the Fini Mermaid Tail fin and she's loving that, too but will need some swim socks/shoes to help keep it on as it's a tiny bit large for her).About floating: In a pool setting we don't really worry about this, but they don't always float up to the surface very quickly so using them in open water I would definitely want to get the sizing right and be sure to keep an eye on them as I could see one getting lost that way if you're not in crystal clear water.