By "scale" I mean échelle, as in "a sense of scale" — une idée de l'échelle du lieu. As it applies to these three photos of the interior of the cathédrale d'Amiens, for example.
There's not much here to give you an idea of the scale of the cathedral. Maybe the chairs.
I this one, there are several people. They are dwarfed by the scale of the building. Of the interior space.
You might recognize one of the people I'm talking about. He's the one among the chairs.
I don't know who this person is but, again, she provides scale.
You can enlarge these images by clicking on them with your mouse or "unpinching" them on your tablet. Do you know that you can press the F11 key on your PC keyboard to put your browser in full-screen mode, and push it again to put it back?