Love these sandals but they run small in every way. I usually wear a 7.5. I ordered an 8 thinking they would be a bit loose, my footbed fills all of the sandal. Definitely order up at least one full size. The top strap is a bit tight on the part that goes over the main part of your foot. If you have feet a bit wider, then DEFINITELY order up. Overall, love these sandals, really comfortable. Ordering another pair in a 9 to see if that fixes any of the issues I was having.