I recently discovered Touch Mapper (touch-mapper.org), a website for generating tactile printable maps.  These can be functionally used by blind or low-vision folks, or as beautiful custom art.

The default size for maps is 200x200mm, and this frame is designed for that.  I'll add other sizes down the line, and perhaps add some improvements like mounting holes.  For now, the printed maps should be a tight friction fit, or use super glue, if necessary.