I really like these boots, but, they aren't really for skinny legged people.  My calves measure about 13 inches around, and these boots gape quite a bit.  The oddest part is that the back part of the boot curves outward, like boots made for 'wide calves' usually do.  Regular calf sized boots usually just go straight up, in my experience.
Anyway, I'm keeping them, because when your calves are 13 inches around you take what you can get.  They look fine if I wear with jeans, and it disguises the gaping, but if I wear with a dress people will comment on my chicken legs.  I may take them to a tailor to get the back seam taken in a bit, but we'll see.  Wearing big fake sweater-boot socks disguises it as well.  We 'chicken legged' people have to figure out how to make stuff work :)