My girlfriend is a painter. She has been an artist for many years. One of her specialities is miniature paintings. We call them Kadoosjes (Dutch for gift in a box). This is because they are so small you can fit them in a matchbox. You can find her paintings here:
The paintings are sold on art-markets, expositions and sometimes in galleries. So we had to find a way to display them. Therefore I designed a miniature frame and printed several of them.
The frame was designed as usual in Tinkercad.
And the printed version looks like this:
Below you will find the STL files you can print if you happen to have purchased one of these Kadoosjes. You can however adapt it for your own purposes.