ISO Paper sizes: For professional printing in Sheffield and elsewhere

The ISO paper system is the most commonly used throughout the UK today. Printers in sheffield will use these every day. For design and printing purposes it standardises pages, make makes it easy to enlarge an A5 flyer to an A3 poster very easily: The height-to-width ratio of all pages is the square root of two (1.4142 : 1). In other words, the width and the height of a page relate to each other like the side and the diagonal of a square. This aspect ratio is especially convenient for a paper size. If you put two such pages next to each other, or equivalently cut one parallel to its shorter side into two equal pieces, then the resulting page will have again the same width/height ratio.

ISO Sizes A series

ISO Code	Size in millimeters	Size in inches	Size in Pixels
4A0 poster	1682 x 2378 mm	66.22 x 93.62 in	19866 x 28087 px
2A0 poster	1189 x 1682 mm	46.81 x 66.22 in	14051 x 19866 px
A0 poster	841 x 1189 mm	33 x 46.81 in	9933 x 14043 px
A1 poster	594 x 841 mm	23.39 x 33 in	7016 x 9933 px
A2 poster	420 x 594 mm	16.54 x 23.36 in	4961 x 7013 px
A3 poster	297 x 420 mm	11.69 x 16.54 in	3508 x 4960 px
A4 flyer	210 x 297 mm	8.27 x 11.69 in	2480 x 3507 px
A5 flyer	148 x 210 mm	5.83 x 8.27 in	1748 x 2480 px
A6 flyer	105 x 148 mm	4.13 x 5.83 in	1240 x 1748 px
A7 flyer	74 x 105 mm	2.91 x 4.13 in	874 x 1240 px
A8 flyer	52 x 74 mm	2.05 x 2.91 in	614 x 874 px
A9 flyer	37 x 52 mm	1.46 x 2.05 in	437 x 614 px
A10 flyer	26 x 37 mm	1.02 x 1.46 in	307 x 437 px

The B series formats are geometric means between the A series format with the same number and the A series format with one lower number. For example, B1 is a geometric mean between A1 and A0. The sides of B0 are 1 m to v2 m.

ISO Sizes B series

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ISO Code	Size in millimeters	Size in inches
B0 poster	1000 x 1414 mm	33.37 x 55.67 in
B1 poster	707 x 1000 mm	27.84 x 39.37 in
B2 poster	500 x 707 mm	19.69 x 27.84 in
B3 poster	353 x 500 mm	13.9 x 19.69 in
B4 flyer	250 x 352 mm	9.84 x 13.9 in
B5 flyer	176 x 250 mm	6.93 x 9.84 in
B6 flyer	125 x 176 mm	4.92 x 6.93 in
B7 flyer	88 x 125 mm	3.47 x 4.92 in
B8 flyer	62 x 88 mm	2.44 x 3.47 in
B9 flyer	44 x 62 mm	1.73 x 2.44 in
B10 flyer	31 x 44 mm	1.22 x 1.73 in