Envelops are available in the following dimensions:
- C6: 11,4 × 16,2 cm
- B6: 12,5 × 17,6 cm
- C5: 16,2 × 22,9 cm
- B5: 17,6 × 25,0 cm
An A4 sheet fits into a C6 (folded twice) or into a C5 envelope (folded once). The envelopes B5 and B6 can be used for a slightly bigger format. They are ideal for posting a C5/C6 envelope as self-addressed envelope.
Sender and receiver can be filled in the PDF form and will be printed on the letter.