Weight

The heavier the content, the stronger the envelope needs to be.

Only an envelope which is appropriate for its contents will allow low-cost mechanical processing and provide effective protection against damage of all kinds.

Recommended envelope paper weights

Envelope/format Number of A4 sheets* Paper weight** Comments
Smaller than 14 x 9 cm - - Special item
C6 1-4 80  
C6 5-8 100  
C5/6 1-15 100  
C5 1-10 100  
C5 11-20 120  
B6 1-12 100 Only select B format if C format is too small
B5 1-35 120 Only select B format if C format is too small
C4/B4 - 120 If only loose sheets are inserted, be sure to reinforce with a cardboard insert.

* Standard paper of 80 g/m2
** in g/m2

Tip: if in doubt, always use a superior envelope quality with a higher paper weight.

Mailings with sharp-edged contents such as brochures with sharp corners, business reports, statistics or extensive reports are particularly prone to damage.

Tip: for this type of mailing, always use envelopes made of heavy (Kraft paper) or tear-proof paper.