I really love these boots.  I'm 5'6, 125 lb and have really narrow feet and average calves.  The boots are fitted, and probably won't be super comfortable for wide feet/muscular calves.  I ordered according to the size chart and they fit perfectly length-wise.  Contrary to other reviews, they don't seem overly wide or loose at the top.  This boot is a good solid investment if you are looking for warm, comfortable, fitted low heeled boots.  I wear mine under my jeans but there is definitely enough room to tuck in your jeans unless you are wearing super thick, knee high boot socks.  I'd recommend these for a practical winter boot.