Ever have issues trying to make two folks who’re standing side-by-side look like they’re appropriate heights?
Unless you’re lucky enough to have live models to work from, and can make yourself a flow chart-
Or if you’re comparing only a handful of people
As an artist, it might be tempting to use comparison shots like the above (I know I have in a pinch!) but in reality, you’ve got no idea how tall the photographer is (which will change the angle/perspective) and even the type of lens will shift things around as well.
I highly recommend drawing your own height chart, or at the very least, make use of tools like this Comparing Height tool that will easily let you do a simple comparison, without excess distracting data.