I'm an 11... but I usually wear men's nikes. All the time.
I chose a canvas keds like shoe from Hot Topic. I was going to do Tom's. But I found the sneakers and they fit a little better with my vision. I'll save the Tom's for the reception. Granted, I'm 5'8" and didnt feel the need to be taller. And the dress didnt need altered if I wore flats.