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Hi i was looking for the same thing as well! and i have found an appropriate and less complicated answer:The International Standards Organisation has prescribed three series, A, B, and C, each with ten different sizes (from zero to ten), as the standard sizes for paper sheets. The size with the largest area is labelled zero and the size decreases in sequence. A4, the most common size, happens to be the fifth in the A series.

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13y ago

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