Here are 2 templates and some example files for designing your own light switch covers/plates for US sized switches. These are templates for "standard" and "Decora" style switchers.
Please see my youtube video on this here for more information:
Attribution for the SVG files used to makes these samples (all from Flaticon.com):
Highfive by Yannick:
https://www.flaticon.com/free-icon/high-five-stroke-gesture-symbol\_55788
Turtle Icon by Freepik:
https://www.flaticon.com/free-icon/turtle\_502465
Tiki Mask by Freepik:
https://www.flaticon.com/free-icon/mask\_502496
Heavy Metal (Rock Horns) By Freepick:
https://www.flaticon.com/free-icon/heavy-metal\_97298
The author marked this model as their own original creation. Imported from Thingiverse.