ISO Paper Sizes

Last updated Aug 13, 2023

There are a number of standard paper sizes in use around the world. In the ISO paper size system, the height-to-width ratio of all pages is the square root of two (1.4142:1).

ISO Code	Size in millimeters	Size in inches	Size in Points
A0	841 mm x 1189 mm	33 in x 46.81 in	2384 pt x 3370 pt
A1	594 mm x 841 mm	23.39 in x 33 in	1684 pt x 2384 pt
A2	420 mm x 594 mm	16.54 in x 23.36 in	1191 pt x 1684 pt
A3	297 mm x 420 mm	11.69 in x 16.54 in	842 pt x 1191 pt
A4	210 mm 297 mm	8.27 in x 11.69 in	595 pt x 842 pt
A5	148 mm x 210 mm	5.83 in x 8.27 in	420 pt x 595 pt
A6	105 mm x 148 mm	4.13 in x 5.83 in	298 pt x 420 pt
A7	74 mm x 105 mm	2.91 in x 4.13 in	210 pt x 298 pt
A8	52 mm x 74 mm	2.05 in x 2.91 in	147 pt x 210 pt
A9	37 mm x 52 mm	1.46 in x 2.05 in	105 pt x 147 pt
A10	26 mm x 37 mm	1.02 in x 1.46 in	74 pt x 105 pt
B0	1000 mm x 1414 mm	33.37 in x 55.67 in	2836 pt x 4008 pt
B1	707 mm x 1000 mm	27.84 in x 39.37 in	2004 pt x 2835 pt
B2	500 mm x 707 mm	19.69 in x 27.84 in	1417 pt x 2004 pt
B3	353 mm x 500 mm	13.9 in x 19.69 in	1001 pt x 1417 pt
B4	250 mm x 352 mm	9.84 in x 13.9 in	709 pt x 1001 pt
B5	176 mm x 250 mm	6.93 in x 9.84 in	499 pt x 709 pt
B6	125 mm x 176 mm	4.92 in x 6.93 in	354 pt x 499 pt
B7	88 mm x 125 mm	3.47 in x 4.92 in	249 pt x 354 pt
B8	62 mm x 88 mm	2.44 in x 3.47 in	176 pt x 249 pt
B9	44 mm x 62 mm	1.73 in x 2.44 in	125 pt x 176 pt
B10	31 mm x 44 mm	1.22 in x 1.73 in	88 pt x 125 pt

# ISO Size Variations

Generally in Europe alone, so sizes are in mm only.

Name	Size in millimeters
A2 extra	445 mm x 619 mm
A3 extra	322 mm x 445 mm
A3 Super	305 mm x 508 mm
Super A3	305 mm x 487 mm
A4 extra	235 mm x 322 mm
A4 Super	229 mm x 322 mm
Super A4	227 mm x 356 mm
A4 Long	210 mm x 348 mm
A5 extra	173 mm x 235 mm
SO B5 extra	202 mm x 276 mm

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ISO Paper Sizes

# ISO Size Variations

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