Reviews say the 1964 T CVS boots run large, I have no clue how that's possible. I wear a size 10 EE in just about anything and these were LOOSE on me with a regular sock on(ordered a size 10 D and a 10.5 D just in case, based on reviews). The size 10s were loose from the heel all the way through the toe box (was slightly more snug) and overall felt huge to wear. Next round, i'd rather try the 9 and 9.5 range to see if they fit any better.