The following are the internationally standard sizes for Series A and Series B office paper, covering three units of measurement: millimeters (mm), centimeters (cm), and inches (in), along with descriptions of their primary applications. This information is suitable for reference in scenarios such as foreign trade, office equipment, and printing.
Detailed Explanation of Common North American Paper Sizes
This guide covers the three most widely used paper sizes in North America, with their dimensions and typical applications.
| Paper Size | Dimensions (in) | Dimensions (mm) | Typical Applications |
|---|---|---|---|
| Letter | 8.5 × 11 | 216 × 279 | General office printing, academic documents (North American standard office paper) |
| Legal / F14 | 8.5 × 14 | 216 × 356 | Contracts, legal documents (hence the name "Legal") |
| Tabloid (Ledger) | 11 × 17 | 279 × 432 | Tabloids, newsletters, small-format newspapers, large-format layouts |
INTERNATIONAL STANDARD
A Series (Most common, with A4 as the representative format)
Size |
mm |
cm |
inch |
Features and Applications |
|---|---|---|---|---|
| A0 | 841 × 1189 | 84.1 × 118.9 | 33.1 × 46.8 | Large posters, engineering drawings |
| A1 | 594 × 841 | 59.5 × 84.1 | 23.4 × 33.1 | Posters, large-format printing |
| A2 | 420 × 594 | 42 × 59.4 | 16.5 × 23.4 | Posters, CAD drawings |
| A3 | 297 × 420 | 29.7 × 42 | 11.7 × 16.5 | Briefings, manual pages, large documents |
| A4 | 210 × 297 | 21 × 29.7 | 8.3 × 11.7 | Global standard office paper, main for printing / copying / contracts |
| A5 | 148 × 210 | 14.8 × 21 | 5.8 × 8.3 | Notebooks, memos, booklets |
| A6 | 105 × 148 | 10.5 × 14.8 | 4.1 × 5.8 | Postcards, small handbooks |
| A7 | 74 × 105 | 7.4 × 10.5 | 2.9 × 4.1 | Business cards, small cards |
| A8 | 52 × 74 | 5.2 × 7.4 | 2.0 × 2.9 | Labels, stickers |
| A9 | 37 × 52 | 3.7 × 5.3 | 1.5 × 2.0 | Small labels |
| A10 | 26 × 37 | 2.6 × 3.7 | 1.0 × 1.5 | Ultra-small labels |
| A11 | 18 × 26 | 1.8 × 2.6 | 0.7 × 1.0 | Special purposes |
B Series (Commonly used in printing and design; each size is larger than the corresponding A-series format)
Size |
mm |
cm |
inch |
Features and Applications |
|---|---|---|---|---|
| B0 | 1000 × 1414 | 100.1 × 141.4 | 39.4 × 55.7 | Large-format posters, maps, engineering drawings |
| B1 | 707 × 1000 | 70.7 × 100.0 | 27.8 × 39.4 | Posters, large-format printing, exhibition graphics |
| B2 | 500 × 707 | 50.0 × 70.7 | 19.7 × 27.8 | Art prints, promotional posters, photographic reproductions |
| B3 | 353 × 500 | 35.3 × 50.0 | 13.9 × 19.7 | Book interiors, catalogues, high-quality brochures |
| B4 | 250 × 353 | 25.0 × 35.3 | 9.8 × 13.9 | Magazine pages, journals, corporate documents |
| B5 | 176 × 250 | 17.6 × 25.0 | 6.9 × 9.8 | Paperback books, notebooks (widely used in Japan), diaries |
| B6 | 125 × 176 | 12.5 × 17.6 | 4.9 × 6.8 | Pocket books, planners, small notepads |
| B7 | 88 × 125 | 8.8 × 12.5 | 3.5 × 4.9 | Small cards, notecards, mini-journals |
| B8 | 62 × 88 | 6.2 × 8.8 | 2.4 × 3.5 | Labels, stickers, index cards |
| B9 | 44 × 62 | 4.4 × 6.2 | 1.7 × 2.4 | Mini labels, product tags |
| B10 | 31 × 44 | 3.1 × 4.4 | 1.2 × 1.7 | Micro labels, specialty tags |
C Series (Envelope Sizes)
Size |
mm |
cm |
inch |
Features and Application |
|---|---|---|---|---|
| C0 | 917 × 1297 | 91.7 × 129.7 | 36.1 × 51.1 | Large envelopes, engineering covers |
| C1 | 648 × 917 | 64.8 × 91.7 | 25.5 × 36.1 | Large document wallets |
| C2 | 458 × 648 | 45.8 × 64.8 | 18.0 × 25.5 | Large envelopes |
| C3 | 324 × 458 | 32.4 × 45.8 | 12.8 × 18.0 | A3 envelopes |
| C4 | 229 × 324 | 22.9 × 32.4 | 9.0 × 12.8 | A4 envelopes (unfolded) |
| C5 | 162 × 229 | 16.2 × 22.9 | 6.4 × 9.0 | A5 envelopes / A4 folded once |
| C6 | 114 × 162 | 11.4 × 16.2 | 4.5 × 6.4 | A6 envelopes / A4 folded twice |
| C7 | 81 × 114 | 8.1 × 11.4 | 3.2 × 4.5 | Small cards, tickets |
| C8 | 57 × 81 | 5.7 × 8.1 | 2.2 × 3.2 | Mini labels, stickers |
| C9 | 40 × 57 | 4.0 × 5.7 | 1.6 × 2.2 | Tiny labels |
| C10 | 28 × 40 | 2.8 × 4.0 | 1.1 × 1.6 | Micro tags |
| DL | 110 × 220 | 11.0 × 22.0 | 4.3 × 8.7 | Business envelope (A4 tri-fold) |
Domestic Chinese Sizes – Zheng Du
Base sheet: 787×1092 mm
Size |
mm |
cm |
inch |
Features and Application |
|---|---|---|---|---|
|
Full |
787 × 1092 |
78.7 × 109.2 |
31.0 × 43.0 |
Base sheet |
|
2K |
546 × 787 |
54.6 × 78.7 |
21.5 × 31.0 |
Posters |
|
4K |
393 × 546 |
39.3 × 54.6 |
15.5 × 21.5 |
Brochures |
|
8K |
393 × 273 |
39.3 × 27.3 |
15.5 × 10.7 |
Newspapers, exam papers |
|
16K |
273 × 196 |
27.3 × 19.6 |
10.7 × 7.7 |
Books, notebooks |
|
32K |
196 × 136 |
19.6 × 13.6 |
7.7 × 5.4 |
Small books |
Domestic Chinese Sizes – Da Du
Base sheet: 889×1194 mm
Size |
mm |
cm |
inch |
Features and Application |
|---|---|---|---|---|
| Full | 889 × 1194 | 88.9 × 119.4 | 35.0 × 47.0 | Base sheet |
| 2K | 597 × 889 | 59.7 × 88.9 | 23.5 × 35.0 | Posters |
| 4K | 444 × 597 | 44.4 × 59.7 | 17.5 × 23.5 | Brochures |
| 8K | 444 × 298 | 44.4 × 29.8 | 17.5 × 11.7 | Exam papers, brochures |
| 16K | 298 × 222 | 29.8 × 22.2 | 11.7 × 8.7 | 16K (close to A4) |
| 32K | 222 × 149 | 22.2 × 14.9 | 8.7 × 5.9 | Books, notebooks |
Compare A Serise and B Series
