I wear an 8.5 or 9, and use orthotics in my shoes and boots, and the 9 fits great.  I have a slightly wide calf, and these are perfect.  I can wear them with jeans inside or with a skirt.  I love the grippy sole, which isn't that common with nice, dressy boots.  I don't wear them in snow drifts or slush, but if it's icy or the snow is packed down, these help me keep my footing.