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International Paper Sizes


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International paper sizes are based upon a rectangle of paper with an area of one square metre, the sides of which are in the proportion 1:√2. This geometrical relationship is used so that any lengthways halfing of the original rectangle of paper produces another rectangle of paper with the same geometric relationship. For example, the A series is shown below.There are three series of international paper size; A, B, and C. A is the most common series, with A4 being the favoured size for business correspondence. The B series is often used for posters, wall charts, other large items and where circumstances dictate a size of paper intermediate between any two adjacent sizes of the A series. The C series is used mainly when it is necessary to fit an envelope inside another envelope. The range and sizes of the three series are as follows:

A series (mm)

A0

841 × 1189

A1

594 × 841

A2

420 × 594

A3

297 × 420

A4

210 × 297

A5

148 × 210

A6

105 × 148

A7

74 × 105

A8

52 × 74

A9

37 × 52

A10

26 × 37

B series (mm)

B0

1000 × 1414

B1

707 × 1000

B2

500 × 707

B3

353 × 500

B4

250 × 353

B5

176 × 250

B6

125 × 176

B7

88 × 125

B8

62 × 88

B9

44 × 62

B10

31 × 44

C series (mm)

C4

324 × 229

C5

229 × 162

C6

162 × 114

Subjects: Business and Management.


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