I just received my order today and already have printed my return label.  The boot was well made, and very sharp looking BUT it fit like it was a full size smaller.  I have a size 11.5 slender foot and ordered the 12, but my toes were touching the front of the boots, and I knew immediately I would never be comfortable wearing them.  I am so disappointed in the difference in sizing lately, not only with Clarks but with other brands as well.  I mean, don't these companies have RULERS?  It's unacceptable and manufacturers should set some guidelines for all shoe sizing.  Women should never have to read that the shoe they're ordering "runs small" or "runs large".  The frustrating part is that when you wear and order the largest size available, there isn't an option to order the next size up.  I have many Clark's shoes that fit me perfectly, but these boots that I anxiously waited for, were not sized correctly!