Surely you have heard of the term and have even used it without knowing what it means or where it comes from. DIN 476 is the standard governed by **ISO 216 **to delimit the dimensions of a common paper, an example of this is DIN A4.

## What do we mean when we say DIN

The name or acronym was the idea of the German Institute for Standardization, which undertook the task of uniting the different paper formats that existed in the world. Its initials come from **Deutsches Institut für Normung **(DIN).

Measurements are taken in centimeters or millimeters, in some parts, and **the formats vary according to their dimensions **. Certain countries such as Spain are governed by the “folio” format and not by others such as DIN A4, as is the case in almost all others.

The DIN standard is divided into letters: A, B, C, D and E. Each of them in turn have different sizes. It should be noted that the “folio” standard differs in measurements from the DIN A4 standard .

## What lengths does a DIN A4 have

It is known for its distances in inches or centimeters, but they amount to the same thing. The lengths are:

- 21 cm x 29.7 cm
- 8.27 inches x 11.29 inches

It is usually **used for making letters **, although if you fold it in half it is the standard for making brochures. Because it is the international model, it is used for commercial and advertising communications and in general for all types of official documentation.

## There are pixel sizes on a DIN A4 sheet

**A pixel is the minimum composition of an image **. A sum of pixels makes up a drawing that you can see with the naked eye. The higher the number of pixels an image has, the higher its resolution and the better visual quality it will have.

The pixel size of a DIN A4 paper can be determined by knowing its physical dimensions. Therefore, it is easy to calculate that **this format supports a density of 300 dpi **(pixels per inch, the notation used to express this type of unit). This means that a DIN A4 will be 2 480 pixels wide and 3 508 pixels high.

## What are the differences between a DIN A4 paper and a sheet of paper

These two formats tend to be confused and it is necessary to know how to identify them.

### Folio format

This paper format has the measurements 21.5 cm by 31.5 cm. It was used until very recently throughout Europe, and its use declined with the emergence of DIN A4 paper . The latter soon became the **standard and most widely used throughout the world **.

### DIN A4 format

The format is slightly smaller than the folio. Its measurements were previously described (21 cm x 29.7 cm). The papers like this are the ones you use today in your filing cabinets and folders.

The DIN A4 format , which is **the most common in all offices and at home **.

## How do I get the different sizes of DIN paper

The DIN series whenever there is a letter (A, B, C, …) is accompanied by a number from 1 to 10. In this case the hierarchy numbering is the other way around, 0 is the largest and 10 is the smallest . But each series has its peculiarities.

### Sizes in series A

It starts from a sheet of 1 square meter in area. It is the base size and the largest or known as DIN A0. It is then folded into two sheets of the smaller or A1 size. So on until there are proportions between each type of leaves.

For example, a DIN A4 sheet has a surface that is equal to half of an A3 sheet. In this series all the leaves maintain this ratio between length and width, hence they are **symmetrical with each other **.

For a DIN A format , **the division between the length and the width is approximately equal to 1.4142 **. In a DIN A4 it is not the exception and this curiosity also occurs.

But how do the other formats behave?

### Sizes in series B

In this case, the B series formats were created to extend the dimensions of the A series paper. This means that there is a relationship between each of the B series with their corresponding numbering in the A series.

For example, **to calculate the dimensions of a series B you must take into account its corresponding in series A and its previous one **. How does this look like? Well like this:

Serial width B6 = square root of (width of A6 x width of A5)

This means that if the width of an A6 type paper is 148 millimeters and that of an A5 paper is 105 millimeters, then that of a B6 would be 125 millimeters. The same would happen with the DIN A4 series .

### Sizes in C series

This series, on the other hand, is going to become **more standardized to the size of the envelopes **. The relationships that are established in this case are by their relatives in the previous series.

If, for example, you want to calculate the width of a C4 envelope, you must know:

- The width of a DIN A4 paper and that of a B4
- The following formula to calculate its width

Width C4 = square root of (width A4 x width B4)

If you take it to numbers you will realize that the width of a C4 paper is 22.9 centimeters.

## How much DIN papers measure themselves

Depending on the series they are:

### A league

- A0 = 841 x 1189 mm = 33.1 x 46.8 inches
- A1 = 594 × 841 mm = 23.4 x 33.1 inches
- A2 = 420 x 594 mm = 16,5 x 23,4 pulgadas
- A3 = 297 x 420 mm = 11,7 x 16,5 pulgadas
- A4 = 210 x 297 mm = 8.3 x 11.7 inches
- A5 = 148 x 210mm = 5.8 x 8.3 inches
- A6 = 105 x 148 mm = 4.1 x 5.8 inches
- A7 = 74 x 105 mm = 2,9 x 4,1 pulgadas
- A8 = 52 x 74mm = 2 x 2.9 inches
- A9 = 37 x 52 mm = 1.5 x 2 inches
- A10 = 26 x 37 mm = 1 x 1.5 inches

### B series

- B0 = 1000 × 1414 mm = 39.4 x 55.7 inches
- B1 = 707 × 1000 mm = 27.8 x 39.4 inches
- B2 = 500 x 707 mm = 19,7 x 27,8 pulgadas
- B3 = 353 x 500 mm = 13.9 x 19.7 inches
- B4 = 250 x 353 mm = 9,8 x 13,9 pulgadas
- B5 = 176 x 250 mm = 6,9 x 9,8 pulgadas
- B6 = 125 x 176 mm = 4.9 x 6.9 inches
- B7 = 74 x 105mm = 2.9 x 4.1 inches
- B8 = 62 x 88mm = 2.4 x 3.5 inches
- B9 = 44 x 62mm = 1.7 x 2.4 inches
- B10 = 31 x 44 mm = 1,2 x 1,7 pulgadas

Series C

- C0 = 917 x 1297 mm = 36.1 x 51.5 inches
- C1 = 648 x 917 mm = 25.5 x 36.1 inches
- C2 = 458 x 648 mm = 18 x 25,5 pulgadas
- C3 = 324 x 458 mm = 12.8 x 18 inches
- C4 = 229 x 324 mm = 9 x 12.8 inches
- C5 = 162 x 229 mm = 6.4 x 9 inches
- C6 = 114 x 162 mm = 4.5 x 6.4 inches
- C7 = 81 x 114 mm = 3.2 x 4.5 inches
- C8 = 57 x 81 mm = 2.2 x 3.2 inches
- C9 = 40 x 57 mm = 1.6 x 2.2 inches

Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.

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