A simple parametric pride flag rainbow pin generator.
It allows you to generate pins with the colors of the pride flag of your choice and the pins are designed to be printed with any single filament printer.
I've collected more information on the flags, the meaning of the colors and the meaning of the terms used in an article on my personal website.
You can just run make to generate a default set of STL files for a number of pride flags.
If your particular flag is not on the list, ypu can also open parametric pride rainbows.scad in OpenSCAD and change the parameters in the customizer.
More information on how to specify the values and actually print the pins, can be found in print-instructions.md.
The pins are designed to be printed in a single piece and do not require any assembly. A "cutout" with two knobs could be added to the back. This allows you to glue a brooch finding also known as brooch pin and back to it.
I tried both super glue and a glue gun and both worked well. Ultimately I settled for the glue gun, because it is faster and most likely the cheaper option.
The brooch findings I used have two holes in the base plate and I use the two knobs to properly align them.
I've included pictures of the brooch pins I used in the images directory.