If your calf has any girth to it at all, forget it.  The actual shoe size was great, the color was great, and very cute.  I ordered a 12 (normally wear a 10), thinking SURELY the calf would be big enough.  NOT.  The shoe fit loosely, but it would have been doable, but the calf on these polyurethane puppies wouldn't even zip halfway up my leg, and trust me, I was giving it hell.  Returned them for a full refund but would love to see the spindly legged drag queen who can actually zip these circulation cutting beauties all the way up.  (For the record I am a 5'9, average build, actual female)