What is the size of a4 paper in centimeters?

php editor Baicao tells you that the size of A4 paper is 210 mm × 297 mm. This is an international standard paper size and one of the most common office paper specifications. A4 paper is medium in size, easy to carry and store, and is widely used in printing, copying, faxing, and document archiving. Its size is designed with the presentation of text and images in mind, making the paper more convenient and comfortable to use. Whether in school, office or home, A4 paper is an indispensable and important item.

1. Size

The A4 paper specification is 21cm×29.7cm (210mm×297mm). The paper size used in most countries in the world is this international standard.

2. Origin

A4 paper is the origin of 210mm×297mm.

Reason 1:

A rectangle with a length of 2 and a width of 2. The resulting ratio is . However, 297 divided by 210, the result is 1.414, which is close to, and this ratio is exactly the ratio of a piece of paper folded in half to the original paper shape. If it is not such a ratio, such as 4:3, then we will find that after folding in half, the shape of the paper is distorted and becomes 3:2.

Reason two:

In fact, to meet this ratio, there can be other values, such as 282mm×200mm, or other sizes. However, the value of 210mm×297mm is related to the 4 of A4. Since the size of A0 paper is 841mm×1189mm, A4 paper is the size of A0 paper folded 4 times.

So the size of A4 paper is 210mm×297mm.

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