The file 'Mother’s Day Rose Brooch 3D Printer Model' is (stl) file type, size is 76.9KB.
Designed to be used with 15mm diameter magnets, should fit snug in its socket at the back. Maybe add supports for the hole, (I know Cura has a plugin for custom supports, so make a small square pillar in the hole at the back), but if your printer can do bridging for 15mm, then supports are not necessary.
Magnet_Rose_Brooch.stl | 249.3KB |