What is the maximum number of pages I can send and what envelope sizes are available?

Find out how many pages you can send in a single letter and which envelope we’ll use for it.

When sending letters, the envelope size depends on how many sheets you include:

  • For 10 sheets or less
    We use a C5 (A5) envelope, which fits up to 20 double-sided pages (10 sheets).

    • Maximum capacity: 10 sheets (20 pages double-sided)

  • For 11 sheets or more
    We switch to a C4 (A4) envelope, which accommodates significantly more.

    • Maximum capacity: 100 sheets (200 pages double-sided)

What’s the maximum number of sheets/pages that can be sent in a single letter?


You can send up to 100 sheets (equivalent to 200 double-sided pages) in a single letter using a C4 envelope.

The C5 envelope is included in the standard service. If you're sending more than 10 sheets and need a C4 envelope, you can find details about the applicable surcharge in Detailed Pricing on the website