Additional note: Yes, I realize 17"x22" (ANSI C) is a thing. But, that paper wasn't readily available in the specific scenario given. The point is that if all common-use paper has the same proportion, then availability of needing "this or that certain proportion" is less of an issue... or rather becomes a non-issue. When all commonly used paper has the same proportion, then the possibility for the inconsistent proportion problem occurring in every-day life essentially goes away.