I have a 14 1/2 inch calf and these are TIGHT!!! I got them a size smaller than I normally wear and they fit perfect in the foot area.  I own about 6 pairs of Miz Mooz boots.  These are very nice looking but are the least comfortable of all of the boots I own.  I got a great deal on them so I am going to keep them and hope they will stretch out a bit.