Buy one size down, after a month they will stretch a bit. Do not work in them, there is no heel support, but for everyday use they are very comfortable. I work in retail and they hurt my feet but loved how they made my feet feel so breathable and roomy in the toe box but they took a toll on your calf muscles. It was tough, but I had to go back to running shoes with good heel support. However, this is one of my favorite pairs of shoes.