The front of the shoe is a bit large, meaning when you push your toes up to the front they are still just over a half inch from the edge.  if i was able to push my toes up closer to the front of the shoe, my heel wouldn't be at the back edge. I wish these came in half sizes, i had a size 7 before and there was a ton of room at the front and the back, i ordered a 6 and they would fit if the toe thong was closer to the front of the shoe.  comfy sandals though! I use them to walk my dog and they are squishy and comfortable, i have never had a blister from the thong portion either, not even between my toes.