Machine envelopes are envelopes designed especially for use with mailing machines. Mailing machine envelopes are generally slightly larger than their conventional counterparts so that they can be inserted and function efficiently with enveloping processes. A special flap profile ensures these envelopes run on all known mailing machines. Board inserts in boxes of machine envelopes ensure product remains flat for optimum efficiency. Machine envelopes are available in DL, C6 and C5, in white or manilla, and with or without address windows. Paperstone sell machine envelopes manufactured by Postmaster and Basildon Bond.

Mailing machine envelope sizes

Mailing machine envelopes are slightly bigger than their conventional counterparts.