We supply industry-standard machinable envelopes designed for high-speed direct mail inserting equipment. These envelope formats are commonly used for letters, statements, invoices, remittance mail, and marketing campaigns, ensuring smooth production and USPS-compliant processing.
Our envelopes are proven to run efficiently on automated mailing systems, reducing downtime and improving accuracy from print through the post office.
Standard Direct Mail Envelope Sizes
#10 Envelopes (9.5” x 4.125”)
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Regular and window envelopes
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Most common envelope for direct mail and business correspondence
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Compatible with folding and inserting equipment
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Commonly paired with #9 and #10 envelope packages
#9 Envelopes (8.875” x 3.875”)
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Often used as a remittance or return envelope
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Fits inside #10 outer envelopes for multi-piece mailings
6 ¾ Envelopes (6.5” x 3.625”)
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Available in standard and remittance styles
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Frequently used for reply mail and payment returns
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Designed for consistent feeding and sealing
6 ¾ Remittance Envelopes
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Ideal for billing, statement, and payment mailings
Machinable Announcement Envelopes
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A-6 Envelopes (4.75” x 6.5”) – Machinable envelope commonly used for invitations, postcards with envelopes, and small direct mail pieces
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A-7 Envelopes (5.25” x 7.25”) – Popular for folded cards, announcements, and marketing mail that requires automated inserting
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A-8 Envelopes (5.5” x 8.125”) – Ideal for brochures, folded self-mailers placed in envelopes, and light direct mail campaigns
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A-9 Envelopes (5.75” x 8.75”) – Used for larger folded inserts, marketing letters, and statement-style mailings
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A-10 Envelopes (6” x 9.5”) – Larger machinable envelope suitable for multi-page inserts, booklets, and thicker direct mail pieces
- 6 x 9 Booklet Envelopes
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Used for unfolded letters, booklets, and thicker inserts
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Maintains machinability while allowing increased capacity
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9 x 12 Booklet Envelopes
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Designed for full-size documents that cannot be folded
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Common in direct mail, legal, and presentation mailings
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Built for Automated Mailing & USPS Compliance
All envelope sizes listed are standard machinable formats used in automated direct mail production. Our envelopes support:
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High-speed inserting and sealing
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Reliable feeding with minimal jams
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Efficient processing from print to USPS entry
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We can help you select the correct envelope based on paper weight, insert thickness, window placement, and mailing class to maximize postal efficiency and reduce costs.
Special Envelopes Sizes
- #12 and 14 regular Envelopes – Commonly used in ballot mailing and election mailings
- 10 x 13 Booklets and Catalogs Envelopes – Used with larger enclosures such as calendars, Presentation Folders, and thicker materials
Request an Envelope Quote
Ready to get a quote for your envelope printing or mailing project?