I bought 3 pairs returned them all today. I bought one size up. Still toe crushingly small. There is zero support in the shoe and it doesnt wrap around your foot to make it ballet like either. It just looks sloppy. I have two different inserts I use in my flats and that didn't help at all. I usually put Vaseline or antiperspirant on high friction areas and this gets me no blisters. The friction was awful.

They are adorable but as a size 9 I would be an 11 and they need way more elasticity in the shoe to cling to your foot if they are going to have such little support.