A5 size is one size of the ISO paper size series, which defines the paper size of most countries in the world except the Americas. The A5 size is about the size of an adult man’s outstretched palm, and is very close to the Half Letter size in US. A5 dimensions are 148 × 210 in mm, or 14.8 × 21.0 in cm, or 5.83 × 8.27 in inches.
The paper of A5 size is not often used in daily life, because it is not as convenient as A4 size paper as a finished product. It is mainly used to make pocket books or notebooks in non-American countries. Therefore, if paper of A3 size is mainly used for design and art, and A4 size paper is more used in office, then A5 paper is more suitable for mass use as raw material in industrial production.
A5 Size Table
| Size # | in inches | in mm | in cm |
| A5 | 5.83 × 8.27 | 148 × 210 | 14.8 × 21.0 |
A5 size completely follows the principle of ISO A series paper size. An important feature of ISO paper size is that the size of each paper is twice that of the one next to it, because the next one is crosscut from the middle line of the long side of the previous paper. The maximum size of this series is A0, which is exactly one square meter in area. According to the cutting rules of this series, we can get A1, A2, A3, A4, A5, A6, A7, and the minimum to A8, A9, A10, etc.. According to this principle, all sizes of this series comply with the aspect ratio of √2:1. Therefore, when you fold the long sides of A4 paper in half, you will get an area of this size.
A5 is not popular in American countries because US paper sizes are used there. However, even in US, A5 paper is occasionally used when making marketing mails, greeting cards, leaflets or special stationery. For comparison, as mentioned above, the approximate size of paper in the United States is Half Letter, which measures 140 × 216 in mm, or 51⁄2 × 81⁄2″ in inches.
Main Facts
A5 Dimensions:
in inches: 5.83 × 8.27″
in mm: 148 × 210 mm
in cm: 14.8 × 21.0 cm
Area: 1/32 square meter.
Country of use: Popular in most Non-American countries, occasionally used in US.
Other name: DIN A5 Size
Usage: Used to make pocket books or notebooks in Non-American countries; occasionally used in US when making marketing mails, greeting cards, leaflets or special stationery.
Advantages: The finished product is portable..
Disadvantages: Size is too small for bigger size paper products.
Ratio: It follows the ratio of ISO216 size standard, length to width: 1.414:1, or √2:1.
Approximate American size: Half Letter, which measures 140 × 216 in mm, or 51⁄2 × 81⁄2″ in inches.