### Possible Answer

The formats that became A2, A3, ... (A1, A2, A3, etc.) ... two A4 sheets reduced to A5 size fit exactly onto one A4 sheet, ... - read more

... for example A5 is half of A4 size paper and A2 is half of A1 size paper. ... A1: 594 x 841 mm: 23.4 x 33.1 in: A2: ... A3 Plus, or Super A3 as it is ... - read more

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