This is an American Girl (or Our Generation) compatible doll shoe. Print the second one by mirroring on the X axis.
It is a clean, minimalistic slipper. I've added onto it to make several variations but they all come from this shoe.
If you have any interest in making your own custom American Girl shoe then this is the perfect shoe to start from!
If you ever print this thing PLEASE tell me so I can celebrate with my daughter. ;-)