Lightswitch cover
grabcad
Something I put together a while back, I use this as a base for 3d-printed lightswitch covers. If for some reason, you are unwilling to go to a hardware store and get one, this is essentially an exact copy of one of those.
Download Model from grabcad
With this file you will be able to print Lightswitch cover with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Lightswitch cover.