I am so disappointed in this shoe.  I love Kelsi Dagger shoes, and had high hopes for this flat.  They are so beautiful and sharp in person ... unfortunately they also sliced my toes and heels to shreds the first time I wore them.  I wasn't doing heavy walking--just moderate.  Wore them to work--and only walked from my car to my office, then back again later.  I'm not a wimp and can handle a few "breaking it in" blisters, but something about the way these shoes are cut & designed makes them particularly brutal.  If you are bold enough to still order them, then do yourself a favor and size up a full size.  I sized up a half size and my toes were still jammed into the toe of the shoe.  I'm grateful I didn't pay what these shoes originally cost.  Hopeful that some toe and heel cushions will help a bit.