Paper Sizes: DIN C Series (ISO 269:1985)
Common paper sizes
The DIN C series (ISO 269:1985) includes the following formats:
| [Translate to English:] DIN C0 | 917 x 1297 mm | Quadruple sheet | |
| DIN C1 | 648 x 917 mm | Double sheet | |
| DIN C2 | 458 x 648 mm | Sheet | |
| DIN C3 | 324 x 458 mm | Half sheet | |
| DIN C4 | 229 x 324 mm | Quarter sheet (note paper) | |
| DIN C5 | 162 x 324 mm | Eighth sheet (page) | |
| DIN C6 | 114 x 162 mm | Half page | |
| DIN C7 | 81 x 114 mm | Quarter page (postcard) | |
| DIN C8 | 57 x 81 mm | Eighth page | |
| DIN C9 | 40 x 57 mm |
The aspect ratio is √2 : 1. It starts with the DIN C0 paper size, which measures 917 x 1297 mm.
From the base format of this DIN standard, the next smaller sizes are calculated with the formula width : height = √2 : 1.