Privos generally run true to size, but those sale-priced can run smaller or larger and sometimes shorter. One takes one's chances. I needed a comfortable, brown flat, so went for this "on sale" shoe. This one ran large, but is okay with a light sock. Not too great with nylons or barefoot. I knew I was taking a chance, but the shoe will serve, so I'm keeping it. It seems that since Clark took over Privo, the Privo is getting wider. That's unfortunate, because some of us need a slightly narrower "medium" size.