Comment by nacho2sweet

We just use a headless chrome with a sort of wrapper script to do this at my work with a bunch of settings close to the actual size of paper. It allows me to test all of our reports in media->print in dev tools then print->pdf with chrome and only have to design to that spec. Then in our reports we provide a "save as pdf" button instead of encouraging print in all the other possible browsers which would make the task insane and cause me to possibly quit.