most people don’t pay a lot of attention to this next idea but it exists none the less…
the default cube in the blender scene is 2 Meters, each major division on the grid is 1 Meter…
so the easiest way to deal with all of that is to work with that…
next easiest option is to set the blender units to Imperial and then it measures in feet and inches…
the meta rig in rigify comes in at a height of nearly 6ft tall, if you ever put that in the scene with the default cube you will get a good idea…
with that said there is nothing other than the standard of how it works to keep you from using whatever scale you would like including as you mentioned 1 inch = 1 foot (an architectural perspective)…
hope this helps…
😀
