I don’t think that’s a bug.
I think paper sizes are coming from the printer not 3d model/layout units.
It might be neither nor.
When creating a new Layout, only mm, cm, inches are allowed. Just noticed.
Might still be slightly more logic if this were simply Layout units. No big deal anyway…
I think it is due to standard papersizes they are always displayed in these three units
Yes… anything else might not make too much sense anyway.