These are true to size, and fit perfectly, but I had an issue with a point on the top arch of my right foot pressing against the top of the shoe -- just my right foot. So either there was some subtle variation on the way the shoe was made or my right foot is thicker than my left (?) Either way, it just took a little breaking in and the second time I wore these my foot didn't hurt anymore.

These shoes need a little stretching/bending, as trying to squat wearing these will make the cuffs dig into your legs. Also, if you need to wear a thicker sock with these, you'll need to get a size larger, as my thin ankle-length socks just fit (I am a size 5M and ordered the same size for the shoes).