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Dimensions Of B Series Paper Sizes

B Paper Sizes - Quick Lookup

Select the paper size from the 'Size' selector and the unit from the 'Unit' selector - the dimensions will be shown in the dimensions box.

Size Unit Dimensions
in is

The dimensions of the B series paper sizes, as defined by ISO 216, are given in the table below in both millimetres and inches (cm measurements can be obtained by dividing the mm value by 10). The B Series paper size chart is a visual explanation of how the B paper sizes relate to each other.

B Series Paper Sizes Chart - B0, B1, B2, B3, B4, B5, B6, B7, B8

B Series Paper Sizes Chart.

Table of Paper Sizes From B0 to B10

SizeWidth x Height (mm)Width x Height (in)
B01000 x 1414 mm39.4 x 55.7 in
B1707 x 1000 mm27.8 x 39.4 in
B2500 x 707 mm19.7 x 27.8 in
B3353 x 500 mm13.9 x 19.7 in
B4250 x 353 mm9.8 x 13.9 in
B5176 x 250 mm6.9 x 9.8 in
B6125 x 176 mm4.9 x 6.9 in
B788 x 125 mm3.5 x 4.9 in
B862 x 88 mm2.4 x 3.5 in
B944 x 62 mm1.7 x 2.4 in
B1031 x 44 mm1.2 x 1.7 in

To obtain sizes in centimetres, convert mm values to cm by dividing by 10 and in feet by dividing inch values by 12. More units here.

B Series Paper Size Tolerances

ISO 216 specifies tolerances for the production of B series paper sizes in the same way as for A series paper sizes, the specific details of which are as follows:

  • ±1.5 mm (0.06 in) for dimensions up to 150 mm (5.9 in)
  • ±2 mm (0.08 in) for lengths in the range 150 to 600 mm (5.9 to 23.6 in)
  • ±3 mm (0.12 in) for any dimension above 600 mm (23.6 in)

B Series Paper Sizes Definition

The B series paper sizes are defined in ISO 216 in the following way.

The B series paper sizes were created in order to provide paper sizes that weren't covered by the A series, but also use an aspect ratio of 1:root2. B sizes are defined as size B(n) being the geometric mean of size A(n) and size A(n-1). The Geometric Means of 2 numbers being the square root of the product of the two numbers.

This system gives a useful property for enlarging and reducing documents in that the enlargement from A(n) to B(n) is the same as that from B(n) to A(n-1).

As with the A series paper sizes, the standard lengths and widths are rounded to the nearest millimetre.

 

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