I am very happy with this boot. I have calves approx 17" around and the 8.5W boot felt a bit snug when zipped but is actually very comfortable to wear. The foot is very roomy but I could wear thicker socks for warmth so I like that. The zipper goes all the way down to the base of the boot making it easy to put on. This pair of boots was of better quality than I expected, for the price.