My normal shoe size is 10.5 - 11 so I ordered a size 11. There is a solid 1"-1.5" of room from the tip of the Croc to my big toe. I also noticed they are extra wide. I usually wear a 4E sneaker and even these are almost too wide for my feet. I feel like I should have gone for a size 10, but was afraid they would be too short. Maybe if I sported Crocs + socks, in true dad form, they would fit more snugly, but with bare feet they are very, very roomy.