I have the other roofer boots by Thorogood, and I love them.  Although they are difficult to break in, once broken they fit like wrestling shoes and wear like iron.  I thought I'd try these, which look identical but are all smooth leather.  I ordered the same size that I wear in my other boots, 10D (same company mind you, and nearly identical boot), and was very disappointed to find that they were at least one size too big, perhaps two.  I was swimming in them.  I expect sizing differences between different companies, but I expect consistency within a particular shoe company, and this variance was so great that I am now fearful of buying them online any longer.

I give them four stars because they are a high quality product, and Amazon's service was top-notch as always.  Returning them was a breeze.