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International Envelope Series



Belonging to the ISO 216 standard, X1 is a unique paper size that holds its own in the realm of print and design. This particular size is not part of the more commonly known A, B, or C series but rather stands as an independent entity within the ISO framework.

The dimensions of X1 are specifically designed to meet certain printing requirements. Its unique proportions make it an ideal choice for specific projects where traditional paper sizes may not suffice. The versatility of X1 allows it to be used in various applications, from professional printing jobs to creative art projects.

X1 paper dimensions


View All International Envelope 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

One intriguing aspect about X1 is its ratio. Like other ISO 216 paper sizes, it maintains a 1:√2 aspect ratio. This means that when you cut or fold the paper in half along its longer side, you'll get two pieces of paper with the same aspect ratio as the original sheet. This property makes it incredibly efficient for scaling print jobs up or down without distorting the content.

While ANSI series are predominantly used in North America, ISO standards like X1 have gained global acceptance due to their mathematical consistency and adaptability across different scales. It's this universal appeal that has cemented X1's place in international printing and design circles.

While X1 may not be as widely recognized as A4 or Letter sizes, its unique characteristics make it a valuable asset in specific contexts where standard sizes fall short. Its adherence to ISO 216 standards ensures consistency and scalability - key factors that contribute towards effective print design.

Other Formats in the International Envelope Series

Interesting facts about X1

1: X1 paper is a non-standard paper size

X1 paper is not part of the standard ISO 216 series, which includes commonly used sizes like A4, A5, and A6. It is a unique size that falls outside of the standardized range.

2: X1 paper dimensions vary

The exact dimensions of X1 paper can vary depending on the manufacturer or specific requirements. It does not have a fixed aspect ratio or set measurements like the ISO standard sizes.

3: X1 paper is often used for specialized printing

X1 paper is commonly used for specialized printing purposes such as large format posters, banners, or architectural plans. Its non-standard size allows for more flexibility in creating custom designs.

4: X1 paper can be difficult to find

Due to its non-standard nature, finding X1 paper can be challenging compared to readily available ISO standard sizes. It may require contacting specialty suppliers or print shops that cater to unique printing needs.

5: The origin of the term "X" in X1

The "X" in X1 does not have a specific meaning but rather denotes an unknown value. It signifies that this particular size does not conform to any established standards and falls into an unspecified category.

6: Customization options for X1 paper

X1 paper offers greater customization options compared to standardized sizes. Printers can trim it down further or combine multiple sheets to create larger prints according to specific project requirements.

7: Limited compatibility with office printers

Due to its non-standard dimensions, many office printers may not be able to accommodate X1 paper. It is more commonly used with specialized large format printers that can handle custom sizes.

8: X1 paper in historical context

In the past, before the establishment of standardized paper sizes, various countries and regions had their own unique paper size systems. X1 could be seen as a modern-day representation of this historical diversity.

9: The versatility of X1 paper

X1 paper's non-standard nature allows for greater versatility in creative projects. It can be used for artistic prints, unique marketing materials, or any design that requires a distinct and eye-catching size.

10: The future of X1 paper

As printing technology continues to advance, there may be an increasing demand for non-standard sizes like X1. This could lead to further exploration and development of unique paper dimensions to meet evolving printing needs.