I had trepidation about ordering these as I have muscular calves (aka wide calves, about 16.5 inches) but they are great! No problems zipping them up and I have jeans tucked in them. They stay up, not too saggy at the ankle either. Just really good looking, comfortable, well constructed boots. I'm happy I ordered them. The foot size is spot on as well. I'm a 9.5 and they fit perfectly. If you wear really heavy, winter socks, I would order a half-size up.