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International Envelope Series



Belonging to the ISO 216 series, B6 is a paper size that holds its own unique significance. This standard, established by the International Organization for Standardization (ISO), ensures consistency in paper sizes globally. The B6 size is an integral part of this series, offering a dimension of 125mm x 176mm or approximately 4.9 x 6.9 inches.

What sets the B6 size apart is its perfect balance between compactness and usability. It's small enough to be portable and convenient, yet large enough to accommodate substantial content. This makes it an ideal choice for applications such as pocket diaries, notebooks, and brochures where portability meets functionality.

B6 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

The aspect ratio of B6 remains constant even when scaled up or down - a unique feature attributed to the ISO 216 series' ingenious design based on the square root of two (√2). This means you can increase or decrease your document size without losing its proportions or layout integrity.

Interestingly, while ANSI (American National Standards Institute) has its own system for paper sizes in North America, many manufacturers still produce B-series sizes like B6 due to their international recognition and widespread use.

Whether you're designing a pocket-sized brochure or crafting a personal diary layout, understanding the dimensions and characteristics of B6 can help you make informed decisions that enhance your project's effectiveness and aesthetic appeal.

Other Formats in the International Envelope Series

Interesting facts about B6

B6 Paper: Weird and Interesting Facts

1. B6 paper is part of the ISO 216 standard, which defines the A, B, and C series of paper sizes.

2. The dimensions of B6 paper are 125 mm x 176 mm or approximately 4.9 inches x 6.9 inches.

3. B6 paper is commonly used for books, pocket diaries, and notebooks due to its compact size.

4. The "B" in B6 stands for "border," indicating that the dimensions include a small border around the edges.

5. B6 paper is slightly larger than A6 paper but smaller than A5 paper in the ISO 216 standard.

6. In Japan, B6 size is often referred to as "junior size" and is commonly used for personal organizers called Hobonichi Techo.

7. The aspect ratio of B6 paper is approximately 1:1.408, which means it maintains the same proportions when scaled up or down within the ISO series.

8. Despite being less common in North America and Europe, B6 size has gained popularity with bullet journal enthusiasts due to its portable nature.

9. In some countries like Germany and Switzerland, B-series papers are more prevalent than A-series papers for certain applications such as envelopes and postcards.

10. The origins of the ISO 216 standard can be traced back to a German scientist named Georg Christoph Lichtenberg who proposed a simple mathematical formula for determining ideal paper sizes in 1786.