I usually wear a 9.5 in all other brands so I ordered these in a 9.5. When I got them, I was shocked at how small they were. My foot could barely fit into them! I wanted to wear them to a casual day at work so I needed to put socks on and the fit was subsequently even tighter. Now the shoes are so tight that I can't wear them comfortably at all. I would return them and try a 10 but I've thrown away the box and receipt. These shoes run extremely small and very tight, I would definitely order a size up.