Paper - The Graphic Design: Reference and Specification - page 62

i n t e r n a t i o n a l , o r i s o , s h e e t s i z e s
Papers manufactured and sold outside of North America are based on 1 square meter.
The International Standards Organization (ISO) system of paper sizes applies to all grades
of paper and paper board and consists of five series of sizes: A, RA, SR, B, and C. Within
each series, each sheet is twice the size of the next smaller sheet and half the size of
the next larger sheet.

AO
841 × 1189 mm 33 1 ⁄ 8 " × 46 3 ⁄ 4 "

A1
594 × 841 mm 23 3 ⁄ 8 " × 33 1 ⁄ 8 "

A2
420 × 594 mm 16 1 ⁄ 2 " × 23 3 ⁄ 8 "

A3 297 × 420 mm
11 3 ⁄ 4 " × 16 1 ⁄ 2 "
A4 210 × 297 mm
8 1 ⁄ 4 " × 11 3 ⁄ 4 "

The starting point for ISO sizes is the AO sheet, which measures 841 × 1189 mm (33 1 / 8 " × 46 3 / 4 ") and has an area of
1 square meter. Each smaller size is a fraction of the A0 size. For instance, the A1 size (594 × 841 mm) is half of A0, and
the A2 (420 × 594 mm) is one quarter of A0. Sizes larger than A0 retain the same proportions and a numeral prefix is added
to the letter. For example, a 2A0 sheet is twice the size (1189 × 1682 mm) of an AO sheet. The A series is used for general
printed matter, including letterhead and publications.

i s o a s h e e t s i z e s a n d i n c h e q u i v a l e n t s

ISO Size Size (millimeters) Size (inches) approx.

4A0 1682 × 2378 66 1 ⁄ 4 × 93 3 ⁄ 8

2A0 1189 × 1682 25 1 ⁄ 2 × 36 1 ⁄ 8

A0 841 × 1189 33 1 ⁄ 8 × 46 3 ⁄ 4

A1 594 × 841 23 3 ⁄ 8 × 33 1 ⁄ 8

A2 420 × 594 16 1 ⁄ 2 × 23 3 ⁄ 8

A3 297 × 420 11 3 ⁄ 4 × 16 1 ⁄ 2

A4 210 × 297 8 1 ⁄ 4 × 11 1 ⁄ 4

A5 148 × 210 5 7 ⁄ 8 × 8 1 ⁄ 4

A6 105 × 148 4 1 ⁄ 8 × 5 7 ⁄ 8

A7 74 × 105 2 7 ⁄ 8 × 4 1 ⁄ 8

A8 52 × 74 2 × 2 7 ⁄ 8