I have muscular legs and have always struggled to find a boot that would zip up around the largest part of my calf (15") without feeling like the circulation was being cut off in my legs.  This boot is definitely wider than others that are labeled as a wide opening.  I ordered a half size larger (wear a size 6 1/2 and bought a 7) just because I like to wear thicker socks with my boots.  I'm very glad I did because this boot is somewhat slim fitting in the toe area.  Overall I'm really happy with the appearance (lovely cognac color) and fit with the only negative thing is that the heel area inside the boot is really stiff so I will definitely be putting some type of insert to keep from it rubbing blisters until the leather softens.