At BlessOF, our production can handle almost any format sized A x Bmm (H x W) to C x Dmm. But before you determine how large your envelope or bag should be, take a moment to consider the following:
Being seen
Larger formats and unusual proportions really stand out when people empty their post box, something you should never overlook especially during the planning stage.
Postal regulations
When choosing your format, please think about local postal regulations.
For example standard or smaller letters may need to be a certain proportion in terms of length and width. In some areas square letters are only permitted in certain dimensions.
Postage
Local postal service charge different postage depending on the size and weight of the letter. Please visit your country’s postal service website to learn more about specific dimensions, weights and rates.
Further processing
Some envelope inserting machines only work with certain formats. Ask your letter shop or machine manufacturer beforehand.
DIN formats
All formats are based on Height x Width (x Depth)
About DIN formats:
DIN A fits into DIN C which fits into DIN B which fits into DIN E
| Format | Dimensions | Ideal for sending |
| DIN long | 110 x 220 mm | DIN A4 2x Folded |
| DIN C6/5 | 114 x 229 mm | DIN A4 2x Folded |
| DIN C6 | 114 x 162 mm | DIN A5 1x Folded |
| DIN B6 | 125 x 176 mm | DIN C6 |
| DIN C5 | 162 x 229 mm | DIN A4 1x Folded |
| DIN B5 | 176 x 250 mm | DIN C5 |
| DIN C4 | 229 x 324 mm | DIN A4 |
| DIN B4 | 250 x 353 mm | DIN C4 |
| DIN C7 | 81 x 114 mm | DIN A7 |
| DIN E5 | 200 x 280 mm | DIN B5 |
| DIN E4 | 280 x 400 mm | DIN B4 |
| DIN 1/2 C4 | 125 x 324 mm | DIN A4 1x Folded lengthwise |
| DIN 1/2 B4 | 136 x 353 mm | DIN A4 1x Folded lengthwise |
| 1/6 DIN | 220 x 220 mm | DIN A4 1x Folded |
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