There are three ranges of paper sizes, prefixed A, B and C. The most widely used for general printing and letterhead stationery is the A series. The most common of these sheet sizes is the international letterhead size A4, which measures 8-1/4 x 11-3/4 in, or 210 x 297 mm. These paper measurements are defined by the ISO 216 standard.
Standard International Paper Sizes and Measurements
| Paper Size | Inches | Millimeters | Centimeters |
|---|---|---|---|
| A0 | 33.125 × 46.8125 in | 841 x 1188 mm | 84.1 x 118.8 cm |
| A1 | 23.375 × 33.125 in | 59.4 x 84.1 cm | 59.4 x 84.1 cm |
| A2 | 16.5 × 23.375 in | 420 x 594 mm | 42.0 x 59.4 cm |
| A3 | 11.75 × 16.5 in | 297 x 420 mm | 29.7 x 42.0 cm |
| A4 | 8.25 × 11.75 in | 210 x 297 mm | 21.0 x 29.7 cm |
| A5 | 5.875 × 8.25 in | 148 x 210 mm | 14.8 x 21.0 cm |
| A6 | 4.125 × 5.875 in | 105 x 148 mm | 10.5 x 14.8 cm |
| A7 | 2.9375 × 4.125 in | 74 x 105 mm | 7.4 x 10.5 cm |
| A8 | 2.0625 × 2.9375 in | 52 x 74 mm | 5.2 x 7.4 cm |
11 × 17 Inch Size Guide
Folding Examples:
Standard International Paper Sizes and Measurements
| Size | Inches | Millimeters | Suitable Paper Formats |
|---|---|---|---|
| C4 | 12.75 × 9 in | 324 x 229 mm | Flat A4 or A3 folded once |
| C5 | 6.375 × 9 in | 162 x 229 mm | Flat A5, A4 folded once, or A3 folded twice |
| C6 | 4.5 × 6.375 in | 114 x 162 mm | Flat A6, A5 folded once, or A4 folded twice |
| C7/6 | 3.5 × 6.5 in | 89 x 165 mm | 1/3 A4 |
| DL | 4.25 × 8.625 in | 110 x 220 mm | A5 folded once or A4 folded twice |
