They'd be too small for me. I'm about a 12 and a half, but too bad no one makes this size (at least anyone that I know of). For fun I tried on the tech 8's, but the 12 seemed too tight and the 13 felt a tad bit loose. I'm sure thats how the M4's will be, but I didn't have time to try them on when I went to the store. I'll probably go with the 13's though because I can add more soul padding if I really need it, and the 12's felt so tight that I'd know they'd hurt if I wore them more than 30 mins or so.
JohnnyB