Skip to main content

A Series



Belonging to the ISO 216 series, A5 paper size holds a distinctive position in the realm of standardized paper sizes. With dimensions measuring 148mm x 210mm or 5.8 inches x 8.3 inches, it is precisely half the size of an A4 sheet, its larger counterpart in the series.

The A5's unique size makes it an ideal choice for a variety of applications. From personal diaries and notebooks to professional brochures and flyers, this versatile paper format caters to diverse needs with ease.

A5 paper dimensions


View All A 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 aspect ratio of all A-series papers, including A5, remains constant at approximately 1:√2 (1:1.41). This means that when you fold an A-series sheet in half along its longest side, you get two smaller sheets of the next size down with identical proportions.

Furthermore, as part of both ISO and ANSI standards - globally recognized systems for standardization - the use of A5 extends beyond geographical boundaries. Whether you're in Europe adhering to ISO or America following ANSI standards, you'll find that A5 is universally understood and accepted.

Whether your goal is personal organization or professional presentation, leveraging the versatility and global acceptance of A5 can be a strategic move towards efficiency and effectiveness.

Other Formats in the A Series

Interesting facts about A5

A5 Paper: Weird and Interesting Facts

1. The A5 paper size is part of the ISO 216 standard, which was first introduced in 1975 by the International Organization for Standardization (ISO).

2. A5 paper measures 148 x 210 millimeters or approximately 5.8 x 8.3 inches.

3. The A5 size is exactly half the size of an A4 sheet, making it a popular choice for notebooks, diaries, and small booklets.

4. The aspect ratio of A5 paper is 1:√2, which means that if you fold an A5 sheet in half along its longest side, you get two smaller sheets with the same proportions.

5. In some countries like Germany and Austria, A5 paper is commonly used for official documents such as invoices and delivery notes.

6. The term "A" in the ISO paper size series stands for "arithmetic," indicating that each subsequent size is obtained by halving the longer side of the previous one.

7. A5 paper can be easily converted into other sizes within the ISO series by simply folding or cutting it accordingly.

8. Due to its compact size, A5 paper is often favored by artists and designers for sketching or creating small-scale drawings.

9. Many pocket-sized notebooks are designed to accommodate A5 sheets, allowing users to conveniently carry them around for jotting down ideas on-the-go.

10. Despite being widely used today, the concept of standardized paper sizes dates back to ancient times when different cultures had their own preferred dimensions for writing materials.