I've been growing out of a 7 1/2 and into 8s, so I  bought the 8, and they fit --and were comfortable -- right out of the box. Love these shoes. I've had all sorts of foot and knee problems, and can walk comfortably in these. Great for walking or general running-around, and I love, love, LOVE that they are all WHITE. (Why is it so hard to find white shoes?) Have literally had women stopping me to ask where I found these all-white shoes.
As an added bonus, when I unpacked them, they looked small - and then fit perfectly. I'm not sure how, but somehow the shoe manages to look smaller than it is.
VERY happy with this purchase, would definitely recommend.
Am seriously thinking of buying a second pair, to have when these wear out...since you can never count on the same shoes being available for very long.