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ISO Paper Sizes
ISO paper dimensions
provide a standardized international format
based on metric dimensions. The basic size,
A0, contains one square meter of paper,
allowing all sizes to be commonly measured
on the basis of grams per square meter. The
proportion between the two sides of the
sheet is specified as the square root of 2,
or 1:1.4142. This ratio permits all sheets
in the series to be an exact multiple of the
sheet size above and below it. For example,
A0 cut in half creates exactly two A1
Sheets.
A Series
The A Series is the industry standard for
the international metric market. It is based
on the A0 which is one square meter. Each
size is exactly 1/2 the area of the previous
size. The most common sizes for publication
are the A4 Letter and the A3 Tabloid which
folds in half to A4.
|
Size |
Millimeters |
Decimal Inches |
Nearest 1/16" |
|
A0 |
841 x 1189 |
33.11 x 46.81 |
33 1/8 x 46 13/16 |
|
A1 |
594 x 841 |
23.39 x 33.11 |
23 3/8 x 33 1/8 |
|
A2 |
420 x 594 |
16.54 x 23.39 |
16 9/16 x 23 3/8 |
|
A3 |
297 x 420 |
11.69 x 16.54 |
11 11/16 x 16 9/16 |
|
A4 |
210 x 297 |
8.27 x 11.69 |
8
1/4 x 11 11/16 |
|
A5 |
148 x 210 |
5.83 x 8.27 |
5 13/16 x 8 1/4 |
|
A6 |
105 x 148 |
4.13 x 5.83 |
4 1/8 x 5 13/16 |
|
A7 |
74 x 105 |
2.91 x 4.13 |
2 15/16 x 4 1/8 |
|
A8 |
52 x 74 |
2.05 x 2.91 |
2 1/16 x 2 15/16 |
|
A9 |
37 x 52 |
1.46 x 2.05 |
1 7/16 x 2 1/16 |
|
A10 |
29 x 37 |
1.14 x 1.46 |
1 1/8 x 1 7/16 |
B Series
The B Series was designed to fill the voids
between the A Series sizes. These are used
for special applications like posters, wall
charts and labels.
|
Size |
Millimeters |
Decimal Inches |
Nearest 1/16" |
|
B0 |
1000 x 1414 |
39.37 x 55.67 |
39 3/8 x 55 11/16 |
|
B1 |
707 x 1000 |
27.83 x 39.37 |
27 13/16 x 39 3/8 |
|
B2 |
500 x 707 |
19.69 x 27.83 |
19 11/16 x 27 13/16 |
|
B3 |
353 x 500 |
13.90 x 19.69 |
13 7/8 x 19 11/16 |
|
B4 |
250 x 353 |
9.84 x 13.90 |
9 13/16 x 13 7/8 |
|
B5 |
176 x 250 |
6.93 x 9.84 |
6 15/16 x 9 13/16 |
|
B6 |
125 x 176 |
4.92 x 6.93 |
4 15/16 x 6 15/16 |
|
B7 |
88 x 125 |
3.46 x 4.92 |
3 7/16 x 4 15/16 |
|
B8 |
62 x 88 |
2.44 x 3.46 |
2 7/16 x 3 7/16 |
|
B9 |
44 x 62 |
1.73 x 2.44 |
1 3/4 x 2 7/16 |
|
B10 |
31 x 44 |
1.22 x 1.73 |
1 1/4 x 1 3/4 |
C Series
The C Series is the standard series for
envelopes and folders. Each C size envelope
is designed to fit the corresponding A size
flat sheet. For example, the C4 envelope is
designed for the A4 letter. A special DL
size envelope was designed to accommodate
the traditional tri-folded letter.
|
Size |
Millimeters |
Decimal Inches |
Nearest 1/16" |
|
C1 |
648 x 917 |
25.51 x 36.10 |
25 1/2 x 36 1/8 |
|
C2 |
458 x 648 |
18.03 x 25.51 |
18 x 25 1/2 |
|
C3 |
324 x 458 |
12.76 x 18.03 |
12 3/4 x 18 |
|
C4 |
229 x 324 |
9.02 x 12.76 |
9 x 12 3/4 |
|
C5 |
162 x 229 |
6.38 x 9.02 |
6 3/8 x 9 |
|
C6 |
114 x 162 |
4.49 x 6.38 |
4 1/2 x 6 3/8 |
|
DL |
110 x 220 |
4.33 x 8.66 |
4 5/16 x 8 11/16 |
SRA Series
SRA sizes are designed for printing presses
to allow gripper margin and bleeds when
printing A Series finished products such as
brochures and letterheads.
|
Size |
Millimeters |
Decimal Inches |
Nearest 1/16" |
|
SRA1 |
640 x 900 |
25.20 x 35.43 |
25 3/16 x 35
7/16 |
|
SRA2 |
450 x 640 |
17.72 x 25.20 |
17 3/4 x 25
3/16 |
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