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International Envelope Series



Belonging to the ISO 216 standard, B10 is a distinctive paper size that holds its own unique place in the world of print and design. This specific size, measuring 31 x 44 millimeters, is part of the B series under this globally recognized standard. The B series is ingeniously designed to bridge the gap between the A and C series, offering a versatile range of sizes for various applications.

The intriguing aspect about B10 and indeed all sizes within the ISO 216 standard lies in their aspect ratio. Maintaining an aspect ratio of √2:1, when a sheet is folded in half parallel to its shortest sides, it results in two sheets with exactly the same proportions as the original. This ingenious design feature ensures consistency across all sizes within this internationally accepted standard.

B10 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

While not as commonly used as its counterparts like A4 or B5, B10 has found its niche use cases. It's often employed for printing small items such as stamps or tiny leaflets where space efficiency is paramount. Its compact dimensions make it ideal for these specific applications where larger paper sizes would be impractical.

In comparison with ANSI standards prevalent in North America, there isn't a direct equivalent for B10 due to differing aspect ratios and measurement systems used by ISO and ANSI standards respectively. However, it's worth noting that despite these differences both standards serve their respective markets effectively while maintaining interoperability on an international scale.

While being one of the smallest members of its family might make B10 seem insignificant at first glance; however upon closer inspection one can appreciate how this diminutive paper size contributes to diversity and versatility within ISO 216’s comprehensive range.

Other Formats in the International Envelope Series

Interesting facts about B10

1: B10 Paper Size

B10 paper is part of the ISO 216 standard series, which defines the sizes of paper used globally. It measures 44 mm × 31 mm (1.73 in × 1.22 in), making it one of the smallest paper sizes available.

2: Rarely Used

B10 paper is rarely used for printing or writing purposes due to its extremely small size. It is primarily utilized for specialized applications such as miniature art, intricate origami, or as a component in microelectronics.

3: Envelope Compatibility

B10 envelopes are not commonly available since they would be impractical for regular mail usage. However, they can be custom-made or found in specialty stationery stores to accommodate small notes or unique invitations.

4: Precision Engineering

The manufacturing process for B10 paper requires high precision machinery and techniques due to its diminutive dimensions. The accuracy needed to produce such small sheets ensures consistency and quality throughout the production process.

5: Niche Collectors' Item

B10 paper has gained popularity among collectors who specialize in rare and unusual stationery items. Its scarcity and unique size make it an intriguing addition to their collections.

6: Miniature Artistry

The compact size of B10 paper presents a challenge that some artists embrace. They create intricate drawings, paintings, or calligraphy on these tiny canvases, showcasing their talent and attention to detail.

7: Microelectronics Applications

In certain microelectronics industries, B10-sized papers are used as separators between delicate components during manufacturing processes. The small size ensures minimal interference and allows for precise handling.

8: Origami Delight

B10 paper is a favorite among origami enthusiasts who enjoy the challenge of folding intricate designs on a miniature scale. It requires precision and patience to create detailed origami models using such small sheets.

9: Historical Significance

The ISO 216 standard, which includes B10 paper, was first introduced in the early 20th century by the German engineer Walter Porstmann. This standardized system revolutionized paper sizes globally, improving efficiency and compatibility.

10: Unconventional Business Cards

Some individuals opt for B10-sized business cards as a unique way to stand out from the crowd. These tiny cards can be memorable conversation starters and leave a lasting impression on potential clients or contacts.