I usually wear 7.5 Medium in Merrell, Ahnu, Clarks... and found them to be the right size.  The quality of the leather looks great & the style is cute enough for something that seems to be very well-cushioned & supportive.  Unfortunately, it was too wide:  I added an orthotic to fit the toe area better, but my heel still lifted while walking.  Surprisingly, 7.5 Narrow fits just right with medium weight socks, though I had to buy it elsewhere as Amazon did not offer it.