A3 Paper is defined by the ISO 216 international paper size standard.
A3 is generally used for posters, plans, charts, and presentations.
A3 Paper Size Chart
| Paper Type | Size | Unit |
| A3 | 11 x 16.5 | Inch |
| A3 | 29.7 x 42 | Cm |
| A3 | 297 x 420 | mm |
| A3 | 842 x 1191 | Pixels (72 DPI) |
| A3 | 3508 x 4960 | Pixels (300 DPI) |