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International Envelope Series



Belonging to the ISO 216 standard, X2 paper size is a unique and often overlooked member of the A series. This particular size, while not as commonly used as its A4 or A3 counterparts, holds its own distinctive place within the spectrum of paper sizes.

The X2 paper size measures at an impressive 648 x 917 mm or 25.5 x 36.1 inches. This makes it significantly larger than most standard office paper sizes, providing ample space for detailed designs, comprehensive layouts, and extensive text.

X2 paper dimensions


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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

One fascinating aspect of the X2 size is its aspect ratio. Like all sizes in the ISO 216 series, it maintains a √2:1 ratio. This means that regardless of how many times you fold or cut an X2 sheet along its shorter side, each resulting piece will retain the same aspect ratio as the original sheet.

While not typically found in everyday print jobs like letters or reports due to its large dimensions, X2 shines in specific applications where more space is required. It's ideal for architectural plans, engineering drawings or large-scale advertising materials such as posters and banners.

While it may not be your go-to choice for everyday printing needs; when it comes to projects that demand a larger canvas without compromising on aspect ratio integrity - X2 stands out as an excellent option within the ISO 216 series.

Other Formats in the International Envelope Series

Interesting facts about X2

1: X2 paper is a part of the ISO 216 standard

X2 paper is one of the many sizes defined by the ISO 216 standard for paper sizes. This international standard was first introduced in 1975 and is widely used across the globe, ensuring compatibility and ease of use in printing and document handling.

2: X2 paper measures approximately 1189 x 1682 millimeters

The dimensions of X2 paper are approximately 1189 x 1682 millimeters or about 46.8 x 66.2 inches. It has an aspect ratio of approximately 1:1.414, which means that when folded in half, it retains the same proportions.

3: X2 paper is commonly used for posters and large-scale prints

Due to its large size, X2 paper is often used for creating posters, banners, architectural plans, and other large-scale prints. Its dimensions provide ample space for detailed designs or extensive information display.

4: The A0 size corresponds to four sheets of X2 paper

In the ISO series of papers, each subsequent size can be obtained by halving its predecessor along its longer side. Therefore, four sheets of X2 (A0) combined would form a single sheet of A0 size (approximately measuring at around 841 x1189 millimeters).

5: The origin of ISO paper sizes can be traced back to Germany

The concept behind standardized paper sizes originated in Germany during the early twentieth century with Dr. Walter Porstmann proposing a system based on mathematical principles known as DIN (Deutsches Institut für Normung). This system later evolved into what we now know as the ISO 216 standard.

6: X2 paper is not commonly found in everyday office use

Due to its large size, X2 paper is not typically used in regular office environments. It is more commonly found in specialized printing shops or industries that require large-format prints, such as advertising agencies, architectural firms, and engineering companies.

7: X2 paper can be cut down to smaller sizes

If needed, X2 paper can be easily trimmed down to smaller sizes using cutting tools or machines. This flexibility allows for customization and adaptation of the paper to specific project requirements without compromising its original proportions.

8: The ISO 216 standard includes both A and B series papers

In addition to the A series (which includes X2), the ISO 216 standard also defines a B series of papers. The B series has slightly different aspect ratios and is often used for larger-sized prints or when a different proportion is desired.

9: The ISO 216 standard promotes efficient use of resources

The ISO 216 standard was designed with efficiency in mind. By using a consistent ratio between paper sizes, it minimizes waste when scaling documents up or down. This standardized approach also simplifies printing processes and reduces costs associated with maintaining multiple paper formats.

10: Different countries may have their own traditional paper sizes

Prior to the adoption of international standards like ISO 216, many countries had their own traditional paper sizes. For example, the United States commonly uses Letter (8.5 x11 inches) and Legal (8.5 x14 inches) sizes instead of A-series papers like X2.