Narrow.
'D' and/or 'M' is the shoe size width measurement, and indicates a medium or standard width. Sometimes the shoe width size will be indicated with only a 'D' or 'M.' Furthermore, a 'C' width would be narrow width, an 'E' width indicates a wide width, and an 'EE' width would be extra-wide. If you're seeking detailed information on the exact width measurements, measured in inches, there should be some U.S. shoe size width charts available on the internet, found using the keywords, "US shoe size width chart."
YAY! (=
When you go to shoe store, they have this feet measurement. It measures both your shoe length and width.
It indicates width of the shoe. B is standard width in ladies' shoes, D is wide.
It can vary from 3-8 mm in width, on average.
a double size
a double size
wide width
EEE
I am finding that most stores and shoe web-sites are not carrying wide width dress shoes for men and I can not believe it.
M means medium, and is a reference to the width of the shoe, not the actual size.