| ISO & JIS | ISO/DIN | JIS | ISO | |
| A | B | B | C | |
| 0 | 841 x 1189 | 1000 x 1414 | 1030 x 1456 | 917 x 1297 |
| 1 | 594 x 841 | 707 x 1000 | 728 x 1030 | 648 x 917 |
| 2 | 420 x 594 | 500 x 707 | 515 x 728 | 458 x 648 |
| 3 | 297 x 420 | 353 x 500 | 364 x 515 | 324 x 458 |
| 4 | 210 x 297 | 250 x 353 | 257 x 364 | 229 x 324 |
| 5 | 148 x 210 | 176 x 250 | 182 x 257 | 162 x 229 |
| 6 | 105 x 148 | 125 x 176 | 128 x 182 | 114 x 162 |
| 7 | 74 x 105 | 88 x 125 | 91 x 128 | 81 x 114 |
| 8 | 52 x 74 | 62 x 125 | 64 x 91 | 57 x 81 |
| 9 | 37 x 52 | 44 x 62 | 45 x 64 | 40 x 57 |
| 10 | 26 x 37 | 31 x 44 | 32 x 45 | 28 x 40 |
| UK paper sizes | Postcards, folders, envelopes for ISO A sizes |
| fromto | A0 | A1 | A2 | A3 | A4 | A5 | A6 | A7 | A8 | A9 | A10 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A0 | 100% | 71% | 50% | 35% | 25% | 18% | 12.5% | 8.8% | 6.2% | 4.4% | 3.1% |
| A1 | 141% | 100% | 71% | 50% | 35% | 25% | 18% | 12.5% | 8.8% | 6.2% | 4.4% |
| A2 | 200% | 141% | 100% | 71% | 50% | 35% | 25% | 18% | 12.5% | 8.8% | 6.2% |
| A3 | 283% | 200% | 141% | 100% | 71% | 50% | 35% | 25% | 18% | 12.5% | 8.8% |
| A4 | 400% | 283% | 200% | 141% | 100% | 71% | 50% | 35% | 25% | 18% | 12.5% |
| A5 | 566% | 400% | 283% | 200% | 141% | 100% | 71% | 50% | 35% | 25% | 18% |
| A6 | 800% | 566% | 400% | 283% | 200% | 141% | 100% | 71% | 50% | 35% | 25% |
| A7 | 1131% | 800% | 566% | 400% | 283% | 200% | 141% | 100% | 71% | 50% | 35% |
| A8 | 1600% | 1131% | 800% | 566% | 400% | 283% | 200% | 141% | 100% | 71% | 50% |
| A9 | 2263% | 1600% | 1131% | 800% | 566% | 400% | 283% | 200% | 141% | 100% | 71% |
| A10 | 3200% | 2263% | 1600% | 1131% | 800% | 566% | 400% | 283% | 200% | 141% | 100% |