My 5 year old grandson is a croc-a-holic and absolutely loves this brand, however, since these are made of more durable material than his "summer" crocs, getting a good fit was not possible; the 10-11 was too small and 12-13 too big, as it allowed for the flannel inside the shoe to slide around (not glued down somehow?). Anyway, he will have to wait for warmer weather to croc it up again! (The fuzzy lined crocs are too hot for him....)