I have 15 inch calves (measured exact) and these boots fit well with jeans on. Boots that measure exactly 15" at the calves have always been too tight for me. These fit snugly. The zipper works great and is not too tough to pull up and down.

1 star knocked off because there were some smudges on the leather around the calves that don't look like they will rub out.

Also, I'm wary that the toes will eventually get scuffed up, the quality of the leather is not superb. I'll just have to take extra care when wearing them.