This was my first project with the Epilog Laser, and was a good way to get familiarized with Inkscape and the etching (raster) + cutting (vector) capabilities of the laser. This is a good first project for anybody!
The first step to this project is to find the dimensions of a standard lightswitch plate. I found all the information I needed at doorware.com - a supplier of all kinds of house-hardware including lightswitches, and had uncommonly helpful documentation on the exact dimensions of their lightswitches -