C6 envelopes are one of the most commonly used paper packaging - they are used not only for correspondence, but also for filing and storing small items. The C6 envelopes measure 114 × 162 mm and hold a sheet of A6 or a double-folded sheet of A4. The tab that closes the envelope is on the long side and its closure system is convenient and quick to use. The C6 white envelopes are also available with a foil window for easy addressing.