These are very loose fitting and feel like they might fall off even with the laces tied as tight as I could get them. They are lightweight, comfortable, and the perfect length though. Apparently people with long feet should also have thick ankles. If I had time I would return these and order different ones, but as it is, I'll just have to use these and hope they don't fall off while going down the river.
***Update: After 1 day of use they started falling apart. You can find MUCH better quality shoes cheaper. Also, once these got wet they began to feel like my feet were wrapped in sandpaper. I think they would be fine as throwaway shower shoes if the price were about $10 less.