These are standard envelope sizes listed in millimeters. The "uses" for each size are suggestions only.

Envelopes in most sizes will come with the following options:

    • Plain face / Window face
    • Lick & Stick / Peel & Seal / Strip & Grip
    • Secretive / Non-secretive

ENVELOPEĀ SIZES.

11B - 90 x 145mm Useful for reply paid purposes.

DL - 110 x 220mm Fits an A4 letterhead folded in 3.

DLX - 120 x 235mm Fits DL booklets or multi-page letters.

C5 - 162 x 229mm Fits A4 sheets folded in half.

C4 - 229 x 324mm Used to fit unfolded A4 sheets.

B4 - 250 x 353mm Used for A4 books.