How wide is the A4 paper, how big is the A4 paper, how long is the length, how much is the width

A4 paper is defined by ISO 216 of the International Organization for Standardization, with a specification of 21*, and most countries in the world use this international standard for paper sizes. This standard was first incorporated into DIN (DIN 476) by the Weimar Republic in 1922, although some of these formats were developed in France during the same period, but have since been forgotten. ISO 216 defines three groups of paper sizes: A, B, and C.

Group C paper size is mainly used for envelopes.

The aspect ratio of Group A paper sizes is 2:1 and then rounded to the nearest millimeter. A0 is defined as an area of one square meter with an aspect ratio of 2:

1 piece of paper. Next A1, A2, A3 ......For other paper sizes, it is defined as folding the paper with one less number along the long side and rounding it off to the nearest millimeter. The size of the B paper is the geometric average of the paper in Group A with the same number and one less number.

Before the popularization of printers, B-group paper was often used. Group C paper size is mainly used for envelopes.

The National Standard of the People's Republic of China GB T 148-1997 "Format Dimensions of Printing, Writing and Drawing Paper" is not equivalent to ISO216:1975.

A4 paper size (width and height): 21 cm (or 210 mm to 297 mm).

The A4 paper we use on a daily basis is the standard paper size used worldwide (A4 paper is defined by ISO 216. ISO 216 defines three sets of paper sizes: A, B, and C, with Group C paper sizes mainly used for envelopes), except for North American countries.

The standard size in the United States, Canada, and Mexico is 11 inches (about centimeters), often referred to as the "letter" size. Whereas A4 paper is slightly longer, about inches

inches (21 cm cm). This and other types of "a" paper sizes are based on the metric system of measurement and have been established by international European standards.

A4 paper forms the basis:

A4 paper and similar sizes are based on metric measurements, as shown below: a sheet of A0 paper is laid out with an area of one square meter, and the maximum size is centimeters (about 33 inches). A0 paper cut in half becomes A1 size at about centimeter by centimeter (or inch by 33").

A1 halving is A2, and so on to A6.

This will produce different sizes of paper, but all with a 1:to-aspect ratio (i.e. a square root of 1:2). The European standard also includes the B paper size. B0 paper is one meter wide and meters high (approximately inches by inches); b1 is b0 cut in half, and so on to b5.

The value of this system of paper sizes is that each size is proportional to the next. A4 paper, for example, is about 21 centimeters (about inches), while A3 is about 42 centimeters (about inches).

If someone has placed text or images on a piece of A4 paper and wants to enlarge it onto A3 paper, it can be done easily without losing any of the content of the document. This uses the square root of 2 (i.e. the ratio is called the Lichtenberg ratio, named after the German physicist, who first pointed out its usefulness. <>

The length of A4 paper is centimeters and the width is 21 centimeters, that is, the size is 297mm 210mm.

The A4 paper size is defined by ISO 216 of the International Organization for Standardization, and most countries in the world use this international standard for paper sizes. ISO 216 defines three groups of paper sizes: A, B, and C.

A4 paper belongs to group A paper, its size aspect ratio is 2:1, A4 paper according to the cutting method, is A1 paper as the full open paper of 8 open, not 16 open, A4 twice the size of A3.

According to the definition of ISO 216, the thickness of the paper will be divided according to the specific grams per square meter, which are 60g, 70g, 75g, 80g, 85g, 90g, 100g, 120g, etc.

Common paper sizes.

A0 paper: the size is 841mm*1189mm

A1 paper: the size is 594mm*841mm

A2 paper: The size is 420mm*594mm, and it is a large 4-carat paper.

A3 paper: the size is 297mm*420mm, that is, the large 8-open paper.

A4 paper: the size is 210mm*297mm, that is, 16 open paper, the most used paper.

A5 paper: the size is 148mm8210mm, that is, 32 open paper.

A6 paper: the size is 105mm*148mm, that is, 64 open paper.

A7 paper: the size is 74mm*105mm

A8 paper: the size is 52mm*74mm

The paper you said about this printer A4 paper, in general, for daily life you will find that especially some office places use, now S printing paper is more, its size is generally 21 29 points 8 cm, so correspondingly. This size is more in the process of use, and in daily life you will also find a lot of this corresponding size of this size, or notebook, or tablet, almost all of them are the same as this A4 paper size.