Paper format
choose your format:
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10
choose your format:
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10
Paper format
ISO 216 defines the A series of paper sizesThe height divided by the width of all formats A B C is the
√2 (1.4142).
Format A0 has an area of one square meter.
Format A1 is A0 cut into two equal pieces. In other words, the height of A1 is the width of A0 and the width of A1 is half the height of A0.
All smaller A series formats are defined in the same way. If you cut format An parallel to its shorter side into two equal pieces of paper, these will have format A(n+1).
The standardized height and width of the paper formats is a rounded number of millimeters.
(source: http://www.cl.cam.ac.uk/~mgk25/iso-paper.html)