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International Envelope Series



The R10 paper size, a unique member of the ISO 216 standard series, holds its own distinctive place in the realm of paper dimensions. This particular size is defined by a width of 26mm and a height of 37mm, making it one of the smallest sizes within this internationally recognized standard.

What sets R10 apart from other paper sizes is its specific use in microprinting. Due to its compact dimensions, it's often employed for printing tiny texts or images that are typically unreadable without special magnifying equipment. This makes R10 an essential tool in various industries where security and confidentiality are paramount.

R10 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

Interestingly, the ISO 216 series to which R10 belongs was inspired by the German DIN 476 standard from 1922. The 'R' in R10 stands for 'Reihe', which translates to 'series' in English - a nod to its German origins.

Despite being part of an international standard, the adoption of R10 isn't universal. It's more commonly used in Europe and Asia than North America, where the ANSI series is prevalent. However, with globalization and digital transformation trends on the rise, we may see increased usage across different regions.

While small in size, R10 plays a significant role within specific industries due to its unique properties and applications. Its existence within the ISO 216 series not only adds diversity but also highlights how different needs can be catered through thoughtful design and standardization.

Other Formats in the International Envelope Series

Interesting facts about R10

1: R10 paper is not a standard paper size

R10 paper does not belong to the ISO 216 series, which is the international standard for paper sizes. It is a non-standard size that may vary depending on the manufacturer or region.

2: R10 paper is commonly used for architectural drawings

R10 paper is often used in the field of architecture and engineering for creating detailed technical drawings, blueprints, and plans. Its larger size allows for more precise scaling and accurate representation of complex designs.

3: R10 paper dimensions can vary

The exact dimensions of R10 paper can differ between countries or manufacturers. However, it typically measures around 26 x 38 inches (660 x 965 mm) or slightly larger.

4: R10 paper provides ample space for annotations

Due to its large size, R10 paper offers plenty of room for adding annotations, notes, and additional details alongside the main drawing. This makes it convenient for architects and engineers to provide explanations or make revisions directly on the same sheet.

5: R10 paper may be difficult to find commercially

Since R10 is not a standardized size like A0, A1, etc., it might be challenging to find commercially available pre-cut sheets of this specific dimension. However, some specialized printing shops or suppliers may offer custom cutting services to meet specific requirements.

6: The origin of "R" in R10 remains unclear

The exact reason behind using "R" as a prefix in naming this particular series of papers remains uncertain. It does not have any direct relation with other common prefixes like "A" or "B" used in ISO paper sizes.

7: R10 paper is not commonly used for everyday printing

Unlike standard paper sizes like A4 or letter, R10 paper is not typically used for regular office printing or general document purposes. Its large size and specialized nature make it more suitable for specific technical applications.

8: R10 paper can be folded to fit smaller storage spaces

Although R10 paper is relatively large, it can be folded down to a more manageable size for storage or transportation. This folding technique allows architects and engineers to carry their drawings conveniently without damaging the content.

9: The aspect ratio of R10 paper is approximately 1.46

The aspect ratio of R10 paper, calculated by dividing the longer side by the shorter side, is approximately 1.46. This ratio remains consistent across different variations of R10 dimensions.

10: Some countries have alternative names for similar-sized papers

In certain countries, papers with dimensions close to that of R10 may have alternative names. For example, in Japan, B2 size (515 x 728 mm) closely resembles the dimensions of R10 and serves similar purposes in architectural and engineering fields.