Paper Sizes: a0, a1, A2, a3, a4, a5

A0 A1 A2 A3 A4 A5 paper sizes

    The international paper was developed in 1922 by a German engineer, Dr. Walter Porstmann.

    He determined that the ratio between the length and the width of the base sheet is equal to the square root of two.

    √2 the ratio is simply a consequence of a requirement to keep the aspect (conservation of the ratio between the length and width).

    Passing from one format sheet format Ax Ax + 1 Ax by folding the sheet in height.

    This standard of paper sizes is used in all countries of the world except North America (USA and Canada).

    Despite the fact that Mexico, Colombia and the Philippines have signed the ISO 216, they still use the paper "letter".

     

  • A0: 46.8 x 33.1 inches

    Paper A0: 1189 x 841 mm - x 118.9 x 84.1 cm - 46.8 x 33.1 inches

    A0: 1189 x 841 mm - x 118.9 x 84.1 cm

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  • A3: 16.5 x 11.7 inches

    Paper A3: 420 x 297 mm - 42 x 29.7 cm - 16.5 x 11.7 inches

    A3: 420 x 297 mm - 42 x 29.7 cm

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  • A6: 5.8 x 4.1 inches

    Paper A6: 148 x 105 mm - 14.8 x 10.5 cm - 5.8 x 4.1 inches

    A6: 148 x 105 mm - 14.8 x 10.5 cm

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  • A9: 2 x 1.5 inches

    Paper A9: 37 x 52 mm - 3.7 x 5.2 cm - 2 x 1.5 inches

    A9: 37 x 52 mm - 3.7 x 5.2 cm

  • A1: 33.1 x 23.4 inches

    Paper A1: 841 x 594 mm - 84.1 x 59.4 cm - 33.1 x 23.4 inches

    A1: 841 x 594 mm - 84.1 x 59.4 cm

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  • A4: 11.7 x 8.3 inches

  • Paper A4: 297 x 210 mm - 29.7 x 21 cm - 11.7 x 8.3 inches

    A4: 297 x 210 mm - 29.7 x 21 cm

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  • A7: 4.1 x 2.9 inches

    Paper A7: 105 x 74 mm - 10.5 x 7.4 cm - 4.1 x 2.9 inches

    A7: 105 x 74 mm - 10.5 x 7.4 cm

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  • A10: 1.6 x 1 inches

    Paper A10: 37 x 26 mm - 3.7 x 2.6 cm - 1.6 x 1 inches

    A10: 37 x 26 mm - 3.7 x 2.6 cm

  • A2: 23.4 x 16.5 inches

    Paper A2: 594 x 420 mm - 59.4 x 42 cm - 23.4 x 16.5 inches

    A2: 594 x 420 mm - 59.4 x 42 cm

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  • A6: 8.3 x 5.8 inches

    Paper A5: 210 x 148 mm - 21 x 14.8 mm - 8.3 x 5.8 inches

    A5: 210 x 148 mm - 21 x 14.8 mm

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  • A10: 2.9 x 2 inches

    Paper A8: 74 x 52 mm - 7.4 x 5.2 cm - 2.9 x 2 inches

    A8: 74 x 52 mm - 7.4 x 5.2 cm

 

Some information on paper sizes

- Note that the width of one becomes the length of the next.

- This format is standardized DIN (Deutsche Industrie Normen)

Correspondence table of A0, A1, A2, A3, A4, A5, A6, A7, A8, A9 and A10

All paper sizes used in France