Two paper families cover most of the world. North America uses US sizes such as Letter and Legal, while nearly everywhere else uses the ISO A series. Here are the sizes this site supports and how they compare.
| Size | Millimetres | Inches | Typical use |
|---|---|---|---|
| US Letter | 215.9 × 279.4 | 8.5 × 11 | Everyday documents in the US and Canada |
| A4 | 210 × 297 | 8.27 × 11.69 | Everyday documents in most other countries |
| A5 | 148 × 210 | 5.83 × 8.27 | Notebooks, planners, booklets |
| A6 | 105 × 148 | 4.13 × 5.83 | Pocket notebooks, postcards |
| Half Letter | 139.7 × 215.9 | 5.5 × 8.5 | Small notebooks and inserts for US planners |
| US Legal | 215.9 × 355.6 | 8.5 × 14 | Legal documents, long lists |
| Tabloid | 279.4 × 431.8 | 11 × 17 | Posters, large diagrams, newspapers |
| A3 | 297 × 420 | 11.69 × 16.54 | Drawings, posters, large planners |
Letter vs A4
A4 is slightly narrower and noticeably taller than Letter. If you print a Letter document on A4 paper with scaling turned off, the top or bottom may be clipped. If you print A4 on Letter, you may get extra space at the sides. Always choose the size that matches the paper in your tray.
How the A series works
Each A size is half of the next one up, cut across the long side. A3 folded or cut in half gives A4, A4 gives A5, and A5 gives A6. All A sizes share the same proportions, which is why scaling between them works without distortion.
Which size should I choose?
- Notes and homework: Letter or A4.
- Bullet journals and planners: A5, or A4 folded.
- Pocket notebooks: A6 or Half Letter.
- Large drawings and maps: A3 or Tabloid, if your printer or print shop handles them.
Small sizes can also be printed two to a sheet. Set A5 pages and use the "pages per sheet" option in the print dialog to fit two on one A4 page.
Every generator offers all eight sizes in portrait or landscape. Try the lined paper generator with A5 selected.