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International Envelope Series



Belonging to the ISO 216 standard, R9 is a unique paper size that holds its own significance. This particular size is part of the RA series, which is designed for raw printing materials. The dimensions of an R9 paper are 32mm x 45mm, making it one of the smallest sizes in this series.

The RA series, including R9, was established by the International Organization for Standardization (ISO), ensuring global consistency in paper sizes. This standardization allows for seamless international communication and exchange of physical documents.

R9 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, despite its small size, R9 plays a crucial role in specific industries. It's often used in professional printing environments where precision and detail are paramount. For instance, it's commonly utilized for printing miniature artworks or detailed graphics that require a high level of intricacy.

Moreover, due to its compact dimensions, R9 is also an economical choice for businesses looking to minimize waste during the printing process. By using smaller sheets like R9 for test prints or proofs before committing to larger print runs on bigger sheets can significantly reduce material wastage.

While it may not be as widely recognized as A4 or Letter-sized papers from ANSI series; the humble R9 holds its own importance within specific niches where precision and economy are key considerations.

Other Formats in the International Envelope Series

Interesting facts about R9

1: R9 paper is a unique size

R9 paper is part of the ISO 216 international paper size standard. It measures 320 mm × 450 mm (12.6 in × 17.7 in), making it larger than the commonly used A4 and A3 sizes.

2: R9 paper is not widely known

While the A series papers like A4 and A3 are widely recognized and used globally, R9 paper is relatively unknown to many people outside of the printing industry.

3: R9 paper has specific applications

R9 paper is often used for specialized printing purposes such as architectural drawings, engineering plans, or large-scale artwork due to its larger dimensions compared to standard office papers.

4: The origin of R series papers

The R series papers were introduced by Germany in the early twentieth century as part of their DIN (Deutsches Institut für Normung) standards. These standards aimed to establish uniformity in various industrial sectors, including paper sizes.

5: The relationship between R and S series papers

The R series papers are closely related to the S series papers. While both have similar aspect ratios, the S series sizes are slightly smaller than their corresponding R series counterparts.

6: Limited availability of pre-cut R9 sheets

Due to its lesser-known status, finding pre-cut sheets of R9 paper can be challenging compared to more common sizes like A3 or letter-sized sheets. However, it can still be obtained through specialty suppliers or custom cutting services.

7: Customization options for R9 paper

Since R9 paper is not as standardized as A series papers, it offers more flexibility for customization. This means it can be easily trimmed or cut to fit specific project requirements.

8: R9 paper and large format printers

R9 paper is often used in conjunction with large format printers that can accommodate its size. These printers are capable of producing high-quality prints on R9 sheets, making them ideal for architectural or engineering drawings.

9: The versatility of R series papers

The entire R series, including R9, offers a range of sizes suitable for various applications. From smaller sizes like R1 to larger ones like R10, these papers cater to different needs within the printing industry.

10: Global adoption of ISO 216 standard

The ISO 216 standard, which includes the R series papers, has been widely adopted by many countries worldwide. This ensures compatibility and ease of use across different printing systems and devices.