It is shaped like a rose, and it fits in the palm of your hand. It's print in place and has holes for magnets to keep it securely closed. It also has a cut-out for a ring on the inside, and the neat part is that it will fit a wide variety of ring sizes without them falling out.

The ring will stay in place because of a separate spring that pushes against the ring to keep it from moving around. -This spring is printed separately and needs to be inserted mid-print (I've included a stop for it in the 3MF file, along with stops for the magnets). *see photo for more details