I am a size 10. Can’t remember the last pair of shoes that weren’t size 10 that didn’t fit perfectly. That said, the Muk Luks “Nick” was a little tight in the toe area for my taste. If I had been in a store I’m positive I would’ve walked out with a 10.5 or even an 11. So…FYI. The shoes have loosened up after a week of wear and they are absolutely wearable with no socks or thin socks, but still a little tight with regular socks. I do like them overall. They look great and seem well made. I’m just accepting the fate of buying shoes online without a test drive first, which in the past hasn’t been too much of a problem.