I know the A-series is more common, but I sometimes prefer the B-series. It’s nice if, for example, you’re looking for something between A4 and A5 (i.e. B5).

Individual images made by Wikipedia user Bromskloss (CC BY-SA 3.0)

  • @apollo440
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    31 year ago

    It’s sqrt(2) for all formats. As you may know, that means you can fold it in half and still have an aspect ratio of sqrt(2).