I’ve inherited a plugin for Blender. It’s one where development stopped a while ago, but I re-discovered it and have been maintaining it ever since. That’s the wonder of open source projects. It’s called Large Print.
It’s useful for setting the render size to all regular and international paper standards at whatever DPI you might need. Basically, it’s a quick way of rendering for art prints and posters.
If this is something you might be interested in using, go download the latest version here.