210 x 297 mm
One may also ask, what size is International paper size?
A-Series International Standard Paper Sizes
| Size | Other Names | Width x Height (mm) |
|---|---|---|
| A2 | (-) | 420mm x 594mm |
| A3 | Ledger, Tabloid | 297mm x 420mm |
| A4 | Letter | 210mm x 297mm |
| A5 | (-) | 148mm x 210mm |