"I bought these boots in a 6W (wide-calf) and had to return them because they were just a hair too big. I usually run right between a 5.5 and a 6 depending on the style of shoe, so I would recommend getting your regular size in this boot and then returning if necessary. The 5.5W wide-calf boots fit me PERFECTLY and the fact that they even have that size is a small miracle! The boots are a great length and look very stylish, but also casual. They are pretty comfortable, but I have yet to wear them for the whole day."