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CAD tip # 5255:
Question
A
Standard paper formats are used for printing - the most widely used are the formats A (A0-A10) and B (B0-B10) - and the format line C (envelopes, C0-C10).
The format series "A" (ISO 216, DIN 476, ANSI/ASME Y14.1m-1995) begins on the size A0 with the area of 1m2. The aspect ratio of its sides (height/width) is the square root of 2 (ã2, 1.4141).
The sizes of the "B"-line are geometric mean of the same and the nearest higher format of the A line. The sizes of the "C"-line are geometric mean of the same formats from the A- and B-lines.
The sizes of the A- and B-formats (in mm) are following:
| Format | A | Format | B |
|---|---|---|---|
| 4A0 | 1682 x 2378 | - | - |
| 2A0 | 1189 x 1682 | - | - |
| A0 | 841 x 1189 | B0 | 1000 x 1414 |
| A1 | 594 x 841 | B1 | 707 x 1000 |
| A2 | 420 x 594 | B2 | 500 x 707 |
| A3 | 297 x 420 | B3 | 353 x 500 |
| A4 | 210 x 297 | B4 | 250 x 353 |
| A5 | 148 x 210 | B5 | 176 x 250 |
| A6 | 105 x 148 | B6 | 125 x 176 |
| A7 | 74 x 105 | B7 | 88 x 125 |
| A8 | 52 x 74 | B8 | 62 x 88 |
| A9 | 37 x 52 | B9 | 44 x 62 |
| A10 | 26 x 37 | B10 | 31 x 44 |
Oversize formats:
| Format | A-oversized |
|---|---|
| A1.0 | 594 x 1189 |
| A2.0 | 420 x 1189 |
| A2.1 | 420 x 841 |
| A3.0 | 297 x 1189 |
| A3.1 | 297 x 841 |
| A3.2 | 297 x 594 |
In drivers, plotter model names, etc, you can find also the US formats:
| Format | Size |
|---|---|
| E | 864 x 1118 |
| D | 559 x 864 |
| C | 432 x 559 |
| B | 279 x 432 |
| A | 216 x 279 |
| - | |
| Letter | 216 x 279 |
| Legal | 216 x 356 |
| Ledger | 279 x 432 |

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31.10.2006
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