The now common paper sizes were standardized in 1922 in Germany by DIN. In total, three standard fo

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Paper Size specifies the dimensions of the sheet of paper under any convention metric system or standard. In the majority of countries metric system of the world used the international paper sizes standardized in DIN 476-2 and ISO 216. In North America, please change paper size based on the dimensions of English inch.
The now common paper sizes were standardized in 1922 in Germany by DIN. In total, three standard formats: A format, starting from A0 with area 1 m and halved with increasing number. B-format, where B n terms of area is halfway between A s and A (n-1). C format, where C n terms of area is halfway between A n and B n.
From the beginning there was also talk of a D-shaped, but the format was deleted since it was deemed unnecessary. As an international standard, the ISO 216 since 1975, but only for A and B series. C series still applies as standard to DIN 476-2 in Germany.
SIS gave out an expanded format series metric system from A to G, described in SS 01 47 11. The current Swedish standard is the international standard, with the Swedish designation EN ISO 216. It contains no longer formats the series C through G, although the C5 and C4 are the most common envelope sizes in Sweden.
Normal format refers to paper (or similar) has a specific format, which is so constituted, that if the paper short side is 1, then the long side to be equal to 2 ( 1: 1.4142). metric system Only if a paper has these proportions, it can be cut in half, parallel to the short side, with the result that the two new pieces get exactly the same proportions as the original. In addition, metric system it is required that paper sizes follow the set standards. By using the system for the normal format, so do not use any paper size have been specially metric system adapted metric system envelopes, file boxes, etc.
In the spirit of belief in reason that characterized above all France after the revolution of 1789, wanted to replace all the old measure with a uniform, coherent system that had its origin in nature. As the starting point was fixed meter, originally defined as a tiomiljondel of the distance between the equator and the pole. From the meter was derived a system of weights and measures and a system for paper was also produced. The paper size from which all other through metric system dichotomy could be developed, had the dimensions 841 x 1189 mm and thus the surface one square meter. The French system for the paper size, however, fell into disuse but was revived in 1921 in Germany, where the sizes later established in the DIN system. Then, the system has been introduced in an increasing metric system number of countries, however, have so far not in the Anglo-Saxon.
A-Series From the above because the size of one square meter area (and thus the dimensions 841 1189 mm) created the so-called A-Series. In this deduced any size (except the largest) of the next larger format by the next larger size were divided into two portions parallel to the short side. Hereby deleted fractions of a millimeter. The paper size named after the series that it was part of, and how many times the paper tudelats to achieve the current size. A paper in A4 thus included in the A-series and has been created by the basic size (A0) has tudelats four times. metric system An A4-size paper is thus 1/16 of the size of an A0 (ie 210 mm x 297 mm). Each paper size was thus half as large as the next larger size.
B-Series A-Series meet, however, far from everyone's needs, so a helpful series, the B series were introduced. B-series paper sizes is midway between the sizes included in the A series. B-series basis is B0, with dimensions of 1000 1414 mm. A paper size B4 is midway between the A4 and A3 in size. A Donald Duck magazine, moreover, format B5.
C Series A further help series was also introduced to fill the needs of several sizes. The C-series has been the basis C0, with dimensions of 917 1297 mm. A paper in the C4 size is in the range between A4 and B4. A practical example of C4 size of the envelopes used for unfolded A4 paper.
E-Series E-Series gives format is slightly smaller than the C-series format. It is used for the inner envelope metric system (envelope). Most common use is E5 and E6. For example, the E6 envelopes just going into a C6 envelope,