A1 Paper Size

What is A1 Paper Size?


When you see the expression as A1 paper size, you see a size within the scope of ISO216 standard. A1 paper size is the second largest size in standard ISO A paper series. It measures 23.39 x 33.11 in inches, 594 x 841 in mm and 59.4 x 84.1 in cm.

Regions of Use

There are different kinds of common paper sizes in the world. Most countries use ISO standard paper sizes except North American countries, Mexico, and the Philippines (they use US paper sizes).


A1 is commonly used for making posters, wall charts, tracing paper, and technical drawings, and is a typical size in this kind of articles.


As a dimension cut directly from A0 in equal proportions, A1 has exactly half a square meter of area. Below is the drawing of A1 in inches and mm. The dimension in cm is 59.4 x 84.1.

A1 Paper Size
A1 Paper Size in inches and mm

A1 Size Chart

A1 dimensions in inches, mm, and cm

Size # in inches in mm in cm
A1  23.39 x 33.11 594 x 841 59.4 x 84.1

A1 dimensions in pixels

A3 dimensions vary in pixels, depending on the PPI/DPI applied.

Size # 72 dpi/ppi
(screen resolution)
96 dpi/ppi
(screen resolution)
300 dpi/ppi
(print resolution)
A1 2384 x 3370 px 3179 x 4494 px 9933 x 14043 px

* PPI (pixels per inch) = DPI (dots per inch) = Resolution

A Series Size Relations

A1 is the second largest paper size in the A series size of ISO 216 standard (based on DIN 476 standard of Germany in 1922), it is obtained by evenly dividing A0 size the largest one of A series size into two halves with the same proportion from the middle.

Then, if an A1 paper is divided into two sheets in equal proportion, you get two sheets of A2 size. By analogy, the order of A paper size from big to small is A0, A1, A2, A3, A4, A5, A6, A7, A8, etc., and each size follows the basic rule of ISO216 standard, that is, the ratio of long side to short side is √2:1. Same as A0 size, paper of this size is not widely used in daily life and work.

The following drawing shows the relationship between the sizes of the ISO A size.

A Paper Sizes Chart
ISO A Paper Sizes Chart

Main Facts

A1 Dimensions in inches, :
in inches: 23.39 x 33.11″
in mm: 594 x 841 mm
in cm: 59.4 x 84.1 cm

A1 size in pixels:
in 72 ppi/dpi: 2384 x 3370 px
in 96 ppi/dpi: 3179 x 4494 px
in 300 dpi/ppi: 9933 x 14043 px

Area: 1/2 square meter.

Country of use: Most countries except North America

Other name: DIN-A1 Size

Usage: Usually used as advertising paper, technical drawings, photos, tracing paper or other printing purposes.

Advantages: The area is larger, so can be used to make complex drawings, and more information can be printed.

Disadvantages: Portability is inconvenient and limited by common printing equipments.

Ratio: It follows the ratio of ISO216 size standard, length to width: 1.414:1, or √2:1.

Approximate American size: ANSI D, which measures 559 x 864 in mm or 22 x 34″ in inches.

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