International Standard Paper Sizes

Daring Fireball
By John GruberSep 26, 2026, 2:46 pm140 ptsTrending
Markus Kuhn: In the ISO paper size system, the height-to-width ratio of all pages is the square root of two (1.4142 : 1). In other words, the width and the height of a page relate to each other like the side and the diagonal of a square. This aspect ratio is especially convenient for a paper size. If you put…

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