Paper formats (part II: DIN-B and DIN-C)

Pandora

2 minutes

In the entry that I made previously Paper formats (part I: DIN-A), we talked in detail about the measures of this type of format, but we were left to discuss the DIN-B and DIN-C. They are less used on a day-to-day basis but we must also know of their existence and know their basis in case we ever have to go to them in our work, for a designer or creative it is essential to have this type of knowledge.

They are mainly used to name and recognize measures of clutch and bags.

The formats of the B series are always larger than those of the A series. And the formats of the C series are in between the two previous ones. Like the A formats, they are subdivided into ten proportional sub-formats depending on the size in millimeters of each of their sides.

For those who are good at math, the proportions are as follows:

The exact measurements of the formats for the B series are the geometric mean of the values ​​relative to the corresponding format and the one immediately higher than series A.
For example:
B0 = 1000 × 1414 mm2 =? (841 · 1189) ×? (1189 · 1682) mm2, results from the A0 (841 × 1189 mm2) and 2A0 (1189 × 1682 mm2) formats.
The measures of the series C are the geometric mean of the formats of the same number of series A and B, they usually name envelope measures.
For example:
C0 =? (841 · 1000) ×? (1189 · 1414) mm2 = 917 × 1297 mm2.
The C formats have a direct relationship with the A format, for example an A4 sheet folded parallel to its shorter sides fits in a C5 envelope and folded twice fits a C6 envelope.
But the best to clarify is to see the following images:
Source and images: paper sizes,

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