I reworked this through several iterations, and am finally happy with this iteration. I recommend not using ironing to smooth in your slicer, since this has small features that get gummed up pretty easily.
Pin is ~19mm wide x ~23.6mm tall, so fits well as an accessory added to shirts and jackets, or can be used as graffiti attached to magnetic surfaces.
I uploaded stl files with and without the cutout for 6x2x20mm magnet. If you scale up and want to add a different attachment, you can use the “noCutOut” version of the model as a starting point.
Color change during the print gives multi-color without MMU.
The author marked this model as their own original creation.