I have already owned two pairs of tall leather boots in black and gray with back zipper.  When I spotted this Frye Felicity Boot also back zipped in such a great deal, I decided to order this, my real size 7.5B.  Overall, the sizing is a bit loose and a bit long, there is a bit room in the toe box, the heel area is a bit loose when tried in barefoot.  With a pair of regular thickness of socks, which I would normally wear with boots, they fit great. But they still look a bit long, perhaps, it is due to the lighter brown color in the front. Shaft height is 16.5", sits right below my knee which is perfect, and the width of shaft also fits my calf perfectly. (I am 5'6", calves 14"), there is still little room for something thin, like, skinny jeans.  The leather and the craftsmanship inside and out, are of excellent quality (like my other two pairs of Frye). Heel is 2.25" which is perfect and they are very comfortable right out of the box. I decided to keep them even though they look a bit long.  Overall I am very satisfied with the price and quality of them.