i wear a 10 shoe, got recommended by the kid at the shop who had the exact same foot size/shape to get some burton freestyle boots, got an 8, felt reallly tight at first, possibly could have gone with an 8 1/2, but once they packed out they fit perfectly.
I've tried Thirty Two, Vans, Nike all in 13's, which I wear in casual shoes. All were too small for my feet. I just picked up a Burton Driver X 2011 model in a 13. Fit perfectly and was a fit that I was hoping to get in other brands but never did.