I don't understand the reviews that say this shoe runs small.  Yes, if you have a wide foot and try to get it into a medium width, there would be a problem.  This is my 4th New Balance shoe.  I ordered my regular size, 8 1/2 M, and the fit is perfect!  Very cushy insole.  Substantial mesh material does not give too much which makes it hold up for walking and exercise class.  And the black and white are cute!