I'm another disappointed customer. I've always loved Isotoner Ballerina slippers, but they have changed, as other have said. I wear a 7.5 AA shoe. I tried both a Size M and a Size L.  The Size M is too small for me, and the Size L is too big. Also, I don't like how they have "lowered" the part covering the toes - i.e., there is now less coverage.  I returned them both and am going to try a different brand.  (They ARE cute, though.)