Wallpaper for monitor sizes in inches?

I'm looking for a wallpaper that starts in a box shape from the bottom left or top left to show the image sizes in inches. I found one for smartphones but not a useful one for PCs. It's just because I'm sitting at a 17 inch notebook and buying a 13 inch Mac and I want to see how much I lose as a result.

Just paint it yourself with paint.net

The size of the monitor has nothing to do with the resolution, if both monitors have full HD and the picture fits it