I was asked to make some picture frame wall shelves and thought adding little rosette pieces on the corners would look nice. I couldn't find what I was looking for in the right size at the store so I made my own.
These are 1 1/4" squares which was the size of the molding I used for the frame. I'm sure it could be easily scaled up or down depending on your needs.
I printed these at .2mm ans 15% infill.