@fgrosshans@mathstodon.xyz @ShadSterling@mastodon.social @NanoRaptor@bitbang.social that would be more logical, but the international standard does it differently. I also remembered slightly wrong - the numbering is arithmetic, not geometric, so the size I thought would be 12A0 is actually 4096A0 .... Which would make the standard rather useless for anything larger than an extremely large sheet of paper, unfortunately. https://en.wikipedia.org/wiki/International_standard_paper_sizes