A very customizable button.
Included are three designs (two sizes, and both raised and sunken letters in two different fonts). But you can of course create many more buttons with this OpenSCAD script.

If you want examples how to include text, see also the configurable text button. There you find STLs for more than 600 popular first names.

Customize the button to fit your application, change the font or the letter / symbol shown. To do that, please install OpenSCAD on your own computer and follow the customizing instructions below or follow these in depth instructions.

Attribution
The OpenSCAD script is based in an early version on the "Parametric Button Generator - Metric Edition" of thistof (Christof Munoz). Thanks!

If you could take a picture of an actual print, please "comment" and attach the picture. - I am curious to see your uses in the wild!

If you like it, please have a look at all my customizable creations. There are configurable-text-based creations, multi-line label, gadget display stand, sweeping name plate, bunting banner, customizable text box III, pyramid text, name plate, Customizable text box with lid and round text. Have also a look at my configurable pack of dogs, rabbits, reindeers and santas. There are also useful coat hangers and finger toys.

Have fun!

Print instructions

Printing
You can print it without any support.
You can also print the buttons vertically in case the font you selected needs fine detail.

If you want a better contrast for the letters, please pause and switch the filament during printing.