Bi-Fold Self-Mailers
Bi-Fold Self-Mailers give you more space than a postcard while eliminating the need for an envelope. They’re perfect when you want to convey more information without sacrificing simplicity or adding mailing costs for envelopes.
These mailers are folded in half, sealed at the edges, and mailed as a self-contained unit.
Bi-Fold Self-Mailer Specs
Feature
Details
Flat Size
6" x 18" (folded to 6" x 9")
Paper Type
Premium Cardstock (similar to postcards, 16pt C1S)
Sealing
Glue tabbed (edge-sealed for mailing)
Postage Class
First-Class Mail (1-5 business days)
Why Bi-Fold Self-Mailers Work
More space for storytelling: Two panels allow for expanded content, great for offers, event details, or product catalogs.
No envelope needed: Savings on material and postage while ensuring your message stays secure.
Visually striking: The larger format (6x9 folded) stands out compared to standard letters and postcards.
Best Use Cases for Bi-Fold Self-Mailers
Use Case
Why Bi-Folds Work
E-commerce New Product Launches
Highlight multiple products or offers with vibrant visuals.
Real Estate Market Updates
Share neighborhood stats, recent sales, and market insights.
Event Invitations
Provide event details, maps, and RSVP instructions.
Educational Campaigns
Perfect for non-profits or service providers needing to explain programs.
Design Guidelines for Bi-Fold Self-Mailers
Element
Spec
Resolution
300 DPI for all images and graphics
Bleed
0.125” around edges
Safe Zone
0.25” inside the edges
Folds & Panels
Design with front cover, inside panels, and back cover in mind
File Format
Fonts
Sans-serif for readability (Open Sans, Lato); minimum 10pt size
First-Class Mail Only
Bi-Fold Self-Mailers are shipped via First-Class Mail for faster delivery:
Estimated Delivery: 1-5 business days
Includes address forwarding & return if undeliverable
Common Mistakes to Avoid
Ignoring the fold layout: Ensure that critical design elements (e.g., headlines, CTAs) don’t get lost in the fold lines.
Overcrowding the panels: Use the space wisely—keep one core message per panel to maintain flow and readability.
Skipping address placement: Make sure your mailing address block is positioned correctly on the back cover panel.
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