Bought the size I generally wear in wolverine boots.  When they arrived, one boot went on ok, could never get the other foot into the other boot, too tight.  Compared both boots side-by-side and they appeared to match in size and width.  Returned boots for purchase price less about 20%.  Bought a pair of Justin's from local store where I could try them on first - they fit perfect.  Nothing against wolverine (have several pair) but for me I like the ability to test drive boots before purchase as boots seem to vary greatly in fit even though they are sized the same.