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A Series



Belonging to the ISO 216 standard, A1 paper size holds a significant position in the global paper size hierarchy. This international standard, adopted by most countries worldwide, excludes Canada and the United States, which follow their unique ANSI series.

A1 paper size is characterized by its dimensions: 594 x 841 millimeters or 23.4 x 33.1 inches. It's precisely half the size of an A0 sheet, adhering to the ISO's principle of maintaining aspect ratio when halved along its shorter side.

A1 paper dimensions


View All A Series

2A046.81 x 66.221189 x 1682119 x 1683370 x 4768
A120.51 x 0.7113 x 181 x 237 x 51
4A066.22 x 93.621682 x 2378168 x 2384768 x 6741
A110.71 x 1.0218 x 262 x 351 x 74
A101.02 x 1.4626 x 373 x 474 x 105
A3+12.95 x 19.02329 x 48333 x 48933 x 1369
A1+23.98 x 35.98609 x 91461 x 911726 x 2591
A0+35.98 x 50.87914 x 129291 x 1292591 x 3662
A64.13 x 5.83105 x 14811 x 15298 x 420
A55.83 x 8.27148 x 21015 x 21420 x 595
A48.27 x 11.69210 x 29721 x 30595 x 842
A311.69 x 16.54297 x 42030 x 42842 x 1191
A91.46 x 2.0537 x 524 x 5105 x 147
A216.54 x 23.39420 x 59442 x 591191 x 1684
A82.05 x 2.9152 x 745 x 7147 x 210
A123.39 x 33.11594 x 84159 x 841684 x 2384
A72.91 x 4.1374 x 1057 x 11210 x 298
A033.11 x 46.81841 x 118984 x 1192384 x 3370

What makes A1 stand out is its versatility across various applications. From architectural drawings and posters to flip charts and diagrams, it serves as an ideal medium for projects requiring ample space without compromising readability.

Interestingly enough, A1 also plays a crucial role in bookbinding. When folded twice along its shorter side, it forms two A2 sheets or four A3 sheets - perfect for large format books or publications.

Whether you're planning a marketing campaign or drafting a blueprint design, understanding the potential of A1 paper can significantly enhance your presentation and communication efforts.

Other Formats in the A Series

Interesting facts about A1

1: A1 Paper Size

A1 paper is part of the ISO 216 standard paper sizes, which was first introduced in Germany in 1922. It measures 594mm x 841mm or approximately 23.4 inches x 33.1 inches.

2: Proportional Dimensions

The dimensions of A1 paper are designed to have a unique aspect ratio of √2 (square root of two). This means that if you divide the longer side by the shorter side, you will always get the same result, which is approximately 1.414.

3: International Adoption

The ISO standard for paper sizes, including A1, has been widely adopted around the world. It is used in more than 150 countries as the standard for printing and office papers.

4: Architectural Drawings

A1 size is commonly used by architects and engineers for creating detailed architectural drawings and technical plans due to its large surface area and convenient proportions.

5: Artistic Applications

A1 paper is also popular among artists for creating large-scale drawings, paintings, and posters. Its size allows artists to work on intricate details while still having enough space to showcase their creativity.

6: Folding Possibilities

A sheet of A1 paper can be folded into halves to create two sheets of A2 size or into quarters to obtain four sheets of A3 size without losing its original aspect ratio.

7: Printing Standards

In professional printing environments, A0 (twice the size of A1) is often used as a reference point for determining printing speeds and quality. A1 is considered a standard size for high-quality prints.

8: Historical Origins

The ISO paper size system was based on the German DIN 476 standard, which itself traces its roots back to a series of paper sizes introduced by the mathematician Georg Christoph Lichtenberg in the late 18th century.

9: Global Variations

While A1 is widely used in most countries, some regions have their own traditional paper sizes that differ slightly from the ISO standard. For example, Japan has its own unique series of paper sizes called JIS B series.

10: Environmental Considerations

A1 paper can be produced using various types of materials, including recycled fibers. Choosing eco-friendly options helps reduce deforestation and promotes sustainability in the paper industry.