This is a sassy shoe.  I had to purchase a 6.5 M because there is not a
6.5 N.  Once I put in a padded sole with arch supports, it fits comfortably.
It would be helpful to know if the shoe runs wide or narrow when one is
ordering from a catalogue or online and where the shoe is made.  Shoes made
in China do not run true to size and tend to be made for fat feet.  Even a
person with a wide foot has a more slender heel.  The zipper on the back of
the heel is a good feature.