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International Envelope Series



Belonging to the ISO 216 standard, the X7 paper size is a unique and often overlooked member of this globally recognized series. This specific size, while not as commonly used as its A4 or A3 counterparts, holds its own distinctive place within the realm of standardized paper dimensions.

The X7 paper size is part of an intriguing system that's based on an aspect ratio of √2. This mathematical principle ensures that when a sheet is cut in half parallel to its shorter sides, the resulting halves will again have the same aspect ratio. It's a fascinating blend of geometry and practicality that underpins the entire ISO 216 series.

X7 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

While it may not be your go-to choice for everyday printing needs, X7 has found its niche in specialized applications. Its unique dimensions make it ideal for creating scaled models or detailed diagrams where precision matters. In these contexts, X7 truly shines by offering just enough space without overwhelming with excess.

In comparison to ANSI standards prevalent in North America, ISO's X7 offers a different perspective on paper sizing. While ANSI sizes are based on traditional units and proportions used in printing and publishing since colonial times, ISO sizes like X7 reflect a more modern approach rooted in mathematical consistency.

While it may not be as widely recognized or utilized as other sizes within the ISO 216 series, X7 holds its own unique appeal. Its distinct dimensions coupled with its adherence to geometric principles make it an interesting study for anyone intrigued by design standards or simply looking for an alternative to conventional paper sizes.

Other Formats in the International Envelope Series

Interesting facts about X7

1: X7 Paper Size

X7 paper is not a standard paper size in the ISO 216 series, which is the international standard for paper sizes. It is a non-standard size that may vary depending on the country or manufacturer.

2: Origin of X7 Paper

The origin and specific dimensions of X7 paper can vary significantly across different regions and printing industries. It may be used for specialized purposes or custom requirements.

3: Customization and Flexibility

X7 paper offers flexibility in terms of customization. Its non-standard nature allows it to be tailored to specific needs, making it suitable for unique projects or niche applications.

4: Limited Availability

Due to its non-standard nature, X7 paper may not be readily available at all print shops or suppliers. It might require special ordering or sourcing from specific manufacturers who offer this particular size.

5: Niche Applications

X7 paper finds its use in various niche applications such as specialized packaging, unique brochures, custom invitations, or other creative print projects that demand unconventional dimensions.

6: Non-ISO Standard Sizes

The ISO standard series (A, B, C) includes commonly used sizes like A3, A5, B2, etc., but X7 does not fall within this standardized range. It highlights the diversity and adaptability of the printing industry.

7: Regional Variations

In some regions or countries where X-series papers are prevalent (e.g., Japan), there might be variations like "X-G" instead of "X" alone. These regional variations further add to the complexity of paper sizing.

8: Compatibility Challenges

Using X7 paper may pose compatibility challenges when it comes to printing equipment or software. Printers and design software often have presets for standard sizes, making it harder to accommodate non-standard dimensions.

9: Custom Cutting

To obtain X7 paper, custom cutting is often required. Printers or suppliers may need to trim down larger sheets to achieve the desired size, adding an extra step in the production process.

10: Unique Design Opportunities

The non-standard nature of X7 paper can provide designers with unique opportunities for creativity and innovation. It allows them to break away from traditional formats and explore new possibilities in print design.