I wear a size 12 - Wide shoe, and suposedly that is the max shoe size this sock will fit.  However, even with my large size feet, these socks are a bit on the "big side".  The heel start to come up the back of the sock, and they extend all the way up my calf.  If you have "normal" size feet, they may be too large for you.

I wear mine frequently, and they are holding up - no shrinking (wish they would), no tearing, etc.