Translate the *area of a planet* into a series of rectangular paper formats whose ratio between *width* and *length* is *1:√2* as in series A (ISO 216: A0, A1, etc.)

Name of the series:

planet === roman divinity <== greek divinity >-> *first letter* of the name in ancient Greek

For each planet in the Solar System, a reference format is defined—known as *0* prefixed by its Greek letter—with a ratio *1:√2* rounded to the nearest millimetre and whose area is equal to that of this planet.

All formats in the series are then recursively calculated by dividing the previous length by 2 and recovering the previous width as the new length (L = length / 2; l = width) until a format that can be affixed to an A0 format is reached followed by eleven of the next divisions.

Paper sizes with a ratio of 1:√2 have the particularity of keeping this ratio for each division—not exactly, however, because the result of each division is rounded down to the nearest millimeter—so it is possible to contain two *1* formats in landscape orientation in one *0* format in portrait orientation, four *2* formats (portrait) in one *0* format (portrait), etc.

The approximations induced by rounding produce negligible losses in the case of Series A, but the situation is quite different for planetary formats.

On this site, you will find the dimensions of each of the planetary formats as well as its divisions.

A printable catalogue is also available for download. On each of its pages, it presents the next division, its dimensions and some other information. The catalogue is printed in the first planetary format that can be affixed to an A4, so all formats are at scale 1 from it (*Ε51*, *Α53*, *Κ60*, *Γ53*, *α52*, *Ζ60*, *Κ60*, *Ο57* and *Π57*).