Thanks to all the reviews, I, who is 5'6" with normal size calf (13.75) and usually wear a 7.5 M for boots, got the 7 C/D  and the feet/toes area fit comfortably.  I did put in air cushions to tighten up the fit just a little.  Honestly, the wide let me zip up just snugly with a pair of long skinny jeans; so the M would not have worked out at all.  I don't know how much the leather will loosen up and stretch after a few wears; but even if it did, the fit should give me room to wear with the not-so-skinny jeans. The leather is nice and smooth but not flimsy at all, and I feel very solid and safe in this leather with the lining and lug soles.  Even though the leather is already water resistant, I still liberally sprayed on waterproof sprays just to be double safe.  My only complaint is that I was looking for a pair of tall boots - and while the description says this is a 15" shaft, it's only about 13.5".  So, I am disappointed in this regard.  I might buy another pair if it is indeed 15" shaft.  But otherwise, this is perfect for winter weather wear, practical but stylish and safe at the same time,  and I don't need to sacrifice my nice dressy boots. Highly recommended.