I just got my boots so haven't tried them out in winter weather yet.  I have very wide feet and was also concerned about the fit around the leg/calf.  I usually wear 7-1/2 to 8, so to accommodate a heavy sock, I ordered 8.5 WW.  The fit is fine, in the leg and foot length,  but beware, as mentioned in another review, the toe area tends to be a bit narrow, even with a WW boot size.  I'm sure they'll be fine if I wear a thinner sock as they are a very well insulated boot so warmth should not be an issue.