2 Matching Annotations
  1. Jan 2024
    1. The first time the ratio of length to width was written in a letter dated 25 October 1786. This letter was from the German Georg Christoph Lichtenberg to Johann Beckmann. He wrote here about the advantages of basing paper on a √2 ratio. Lichtenberg is known for the ratio between length and width of a surface which remains the same after the narrated halving of the surface. The result is 1:√2.

      Sourcing? Look this up.<br /> https://www.a5-size.com/history/

  2. May 2021
    1. He proposed the standardized paper size system used globally today except in Canada and the US defined by ISO 216, which has A4 as the most commonly used size.

      This is an interesting bit of trivia.