Unique — #standardsEntries tagged #standards on Unique.https://unique.rzen.dev/en-usInternational Standard Paper Sizeshttps://unique.rzen.dev/reviews/iso-paper-sizes/https://unique.rzen.dev/reviews/iso-paper-sizes/Markus Kuhn's long-running page on ISO 216, from the √2 rule and the one-square-metre A0 to Lichtenberg's 1786 letter and the copier's 71% buttonSun, 27 Sep 2026 00:00:00 GMTdesignpaperstandardsdesign-historyiso-216typographymetric