I've purchased at least 4 pairs of Naturalizer flats and loafers in the last 10 years and most recently tried a pair on in the store a few months ago. My feet are a little narrow, and I have consistently found size 7 to fit perfectly. When these arrived, I tried them on and there was about 1/4-3/8" gap between my heel and the back of the shoe when I positioned my foot as close to the front of it as I would normally wear the shoe. However, width-wise, I don't think I would want them to be any narrower, so I will have to go try on 6.5's somewhere.
Otherwise they seem comfortable and the quality I expect from Naturalizer.