A small sign (10cm x 3cm).  Designed to have built-in magnets (the 8mm x 3mm circular magnets).

If you use the 3mf file, and PrusaSlicer 2.6.0 or later, you can edit the text / font dynamically.  The STL file is blank in case you want to edit it some other way.

The 3mf also has a built-in pause in the print for you to insert the magnets, and a color change when it gets to the text.