![]() ![]() The former has been withdrawn in 2002 in favor of adopting the international standard as DIN EN ISO 216, but part 2 has been retained and was last updated in 2008. In 1991, it was split into DIN 476-1 for the A and B formats on the one hand and 476-2 for the C series on the other hand. The German standard DIN 476 was published on 18 August 1922 and is the original specification of the A, B and C sizes. ☓ mm (0.12 in) for any dimension above 600 mm (23.6 in).☒ mm (0.08 in) for lengths in the range 150 to 600 mm (5.9 to 23.6 in) and.The tolerances specified in the standard are ![]() This interesting arrangement of dimensions is also very useful - not only it forms a geometric progression with easy to remember formulae, it also has that each consecutive pair of values (like a sliding window of size 2) will automatically correspond to the dimensions of a standard paper format in the series. Each of the three geometric progressions (corresponding to the three series A, B, ) is formed by all possible paper dimensions (length and width) of the series arranged in a decreasing order. The α variables are the distinct first terms in the three geometric progressions of the same common-ratio equal to the square root of two. The base A0 size of paper is defined as having an area of 1 m 2 and a dimension ratio of 1 to √ 2, making the A0 paper size exactly 2 4 A size chart illustrating the ISO A series. ![]()
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