"I love this flat and have just purchased a second pair when my first wore out. I usually wear an 8.5 W, but since it was out of stock i sized up for a 9M and it fit just as well. The back of the shoe initially rubs against my heel a bit, but I know it will break in with a little time. The quilting and patent toe are great for both my conservative office and just going around town during evenings and weekends. I love this flat and you will too!"