Mailer Box Dieline Template (FEFCO 0427)
Generate a custom roll-end tuck-top mailer box dieline at your exact inside length, width and height, then download a 1:1 layered SVG for Adobe Illustrator or Inkscape.
A simplified drawing for planning your design. Your free production dieline comes with your proof, made for your exact size and board.
How this flat structure works
A roll-end tuck-top (RETT / FEFCO 0427) mailer folds from a single corrugated sheet with zero glue. Double-thick rolled side walls lock tabs into slots in the base, while dust wings on the hinged lid tuck inside the double walls to block dust and survive parcel drops.
| Engineering specification | Detail |
|---|---|
| Standard reference | FEFCO 0427 (Roll-End Tuck Top / Ear-Lock Mailer) |
| Typical board | E-flute (~1/16 in) or B-flute (~1/8 in) 32 ECT corrugated |
| Glue joints | 0 — 100% self-locking die-cut construction |
| Minimum order | 250 custom printed mailer boxes (no die or plate charges) |
How to fold and lock this dieline
- Pre-break all vertical and horizontal score lines 90 degrees inward along the inside base.
- Raise the front and back walls upright, then fold the four corner extensions inward at right angles.
- Roll both left and right side panels up and over the corner extensions until the locking tabs click into the base slots.
- Fold the hinged top lid forward, slide both lid dust wings inside the rolled side walls, and press the front tuck flap closed.
Order custom packaging in this box structure
Need a press-ready production dieline compensated for your exact board caliper, plus a free 3D mockup?
Request a Quote →Questions about mailer box dieline template (fefco 0427)
Does a corrugated mailer dieline adjust for board thickness?
Yes. On production E-flute and B-flute dies, double-roll side creases include kerf allowances so the inner roll clears the corner flaps cleanly. Our studio builds your exact board-compensated production dieline for free with your proof.
Can I design both outside and inside panels on this mailer?
Yes. Inside printing on the base and inner lid is popular for subscription and DTC unboxing. Mention inside print on your quote and we send a two-sided production dieline.
Still have a question? Ask a packaging specialist.
Request a Quote →Other free 1:1 SVG dieline generators
Embed the free mailer box dieline template (fefco 0427) on your site
Ecommerce guides, 3PL fulfillment calculators, and design classrooms can embed this calculator for free. Copy the snippet below to add it to any page:
<iframe src="https://cubitpack.com/tools/dieline-templates/mailer-box" width="100%" height="620" style="border:1px solid #e2e4ea;border-radius:12px;background:#fff;" loading="lazy" title="CubitPack Free Mailer Box Dieline Template (FEFCO 0427)"></iframe>
<p style="font-size:12px;color:#555;margin-top:6px;">Free tool by <a href="https://cubitpack.com/tools/dieline-templates/mailer-box">CubitPack Mailer Box Dieline Template (FEFCO 0427)</a> · <a href="https://cubitpack.com/custom-mailer-boxes">Mailer boxes</a></p>Popular custom packaging sized with this tool
Get a quote for custom mailer boxes
One dedicated account manager prepares pricing across up to 3 quantities.
- Free design & AI-to-print studio + 3D mockup
- No die or plate charges · 4–5 day rush available
- Free shipping to all 50 states
- 10% off your first order
- Reprint or refund if we get it wrong