In nike shoes I usually wear a 10 but the vionic shoe seems to be too large for me. Also i do a lot of kneeling/ crouching at work and the leather of the toe part was not flexible enough and smashed into the tops of my toes. Still having foot pain. I ordered a 9 1/2 mesh style to see it if makes a difference. I liked the insole though, different from any other shoe I have tried so far.