The DIN B series (ISO 216:1975) includes the following formats:
DIN B0 | 1000 x 1414 mm | Quadruple sheet | |
DIN B1 | 707 x 1000 mm | Double sheet | |
DIN B2 | 500 x 707 mm | Sheet | |
DIN B3 | 353 x 500 mm | Half sheet | |
DIN B4 | 250 x 353 mm | Quarter sheet (note paper) | |
DIN B5 | 176 x 250 mm | Eighth sheet (page) | |
DIN B6 | 125 x 176 mm | Half page | |
DIN B7 | 88 x 125 mm | Quarter page (postcard) | |
DIN B8 | 62 x 88 mm | Eigtht page | |
DIN B9 | 44 x 62 mm |
The aspect ratio is √2 : 1. It starts with the DIN B0 paper size, which measures 1000 x 1414 mm.
From the base format of this DIN standard, the next smaller sizes are calculated with the formula width : height = √2 : 1.