Print + Insert

The letter package is direct mail's closer. An addressed envelope, a personalized letter, and the inserts that carry the ask or the notice, assembled by machine into one sealed piece. It is the format people reach for when the message is personal, the stakes are real, or a reply device has to travel with the letter, anything a postcard's open face cannot carry.

You choose a letter package when privacy, personalization, or a return path matters. A fundraising appeal needs a variable ask amount and a reply envelope; a renewal notice needs the member's specifics and a way to pay; a compliance or legal notice needs to reach exactly one household and prove it did. The envelope buys discretion the open postcard never offers, and the enclosed reply device shortens the distance between reading and responding.

Production runs in stages. Letters print with variable data, name, address, ask string, account details, then fold to fit the envelope: a tri-folded 8.5x11 drops into a #10, a half-fold into a 6x9, and full-size documents into a 9x12 that mails flat. Inserting is where the package comes together, as the letter, a buckslip or reply card, and a business reply envelope feed a single machine pass that collates, inserts, and seals. Window envelopes let the letter's own address show through, which removes a second addressing pass and the mismatch risk that comes with it; closed-face envelopes get addressed and matched by hand instead.

Personalized letters are inserted into window envelopes, so the address that shows through the window is printed on the letter itself. Multipage personalized letters are matched by a computer-controlled inserter that checks the pages match, and personalized letters going into non-window envelopes are matched by hand.

On postage, First-Class buys speed, forwarding, and returns, while Marketing Mail buys price at volume, and we price both from your actual list and in-home dates so the trade is explicit rather than a rule of thumb. Postage prints as a permit imprint, a meter, or live stamps depending on strategy and audience. End to end, we standardize and CASS-certify the list, presort and optimize postage, print, fold, and insert, then enter the mailing Full-Service so it earns automation pricing and feeds tracking back to you.

Letter packages mail at letter automation rates in #10 and 6x9 envelopes, while a 9x12 that carries unfolded documents crosses into flats pricing. The format decides the fold: a tri-folded 8.5x11 drops into a #10 exactly, a half-fold rides in a 6x9, and full-size sheets mail flat in a 9x12. Personalized letters go into window envelopes, so the letter addresses itself, removing a second addressing pass and the mismatch risk that comes with closed-face addressing. Multipage personalized letters are matched by a computer-controlled inserter that checks the pages match, and personalized letters going into non-window envelopes are matched by hand. Postage can print as a permit imprint, a meter, or live stamps, and we enter the mailing Full-Service so it earns automation pricing and feeds tracking.

• #10 is the standard envelope; a tri-folded 8.5x11 letter fits it exactly
• 6x9 carries half-folded letters and cards; 9x12 takes full-size documents and mails as a flat
• Window envelopes address the letter itself, so there is no second addressing pass and no name-to-window mismatch
• Multiple inserts (letter, buckslip, reply card, reply envelope) collate and seal in one machine pass
• Multipage personalized letters are matched by a computer-controlled inserter that checks the pages match; letters for non-window envelopes are matched by hand
• Postage runs permit imprint, meter, or live stamps; First-Class or Marketing Mail, priced from your list
• Letter automation rates apply to #10 and 6x9; a 9x12 crosses into flats pricing
• Full-Service entry earns automation prices and feeds USPS tracking on the drop