Paper & Envelope Sizes
The A series doubles in size with each step down in number: two A4 sheets make one A3.
A series (ISO 216)
| Size | Millimetres | Inches |
|---|---|---|
| A0 | 841 × 1189 mm | 33.1 × 46.8 in |
| A1 | 594 × 841 mm | 23.4 × 33.1 in |
| A2 | 420 × 594 mm | 16.5 × 23.4 in |
| A3 | 297 × 420 mm | 11.7 × 16.5 in |
| A4 | 210 × 297 mm | 8.3 × 11.7 in |
| A5 | 148 × 210 mm | 5.8 × 8.3 in |
| A6 | 105 × 148 mm | 4.1 × 5.8 in |
| A7 | 74 × 105 mm | 2.9 × 4.1 in |
B series
| Size | Millimetres | Inches |
|---|---|---|
| B3 | 353 × 500 mm | 13.9 × 19.7 in |
| B4 | 250 × 353 mm | 9.8 × 13.9 in |
| B5 | 176 × 250 mm | 6.9 × 9.8 in |
| B6 | 125 × 176 mm | 4.9 × 6.9 in |
US paper sizes
| Size | Millimetres | Inches |
|---|---|---|
| Letter | 216 × 279 mm | 8.5 × 11 in |
| Legal | 216 × 356 mm | 8.5 × 14 in |
| Tabloid / Ledger | 279 × 432 mm | 11 × 17 in |
| Executive | 184 × 267 mm | 7.25 × 10.5 in |
Envelopes
| Size | Millimetres | Inches |
|---|---|---|
| DL (fits A4 folded in three) | 110 × 220 mm | 4.3 × 8.7 in |
| C6 (fits A5 folded, A6) | 114 × 162 mm | 4.5 × 6.4 in |
| C5 (fits A5, A4 folded once) | 162 × 229 mm | 6.4 × 9 in |
| C4 (fits A4 flat) | 229 × 324 mm | 9 × 12.8 in |
Frequently asked questions
What size is A4 in inches?
A4 is 210 × 297 mm, or 8.27 × 11.69 inches.
Is US Letter the same as A4?
No. US Letter is 8.5 × 11 inches (216 × 279 mm), slightly wider and shorter than A4.