Free dieline template
A mailer box dieline is the flat, unfolded outline of a roll-end tuck-front box (FEFCO 0427), showing every cut line, fold line and panel so artwork lands in the right place when the box is folded. Enter your inside length, width and depth below to download a layered SVG you can open in Illustrator, Figma or Canva.
Last updated November 12, 2026
Need a blank vector template for Adobe Illustrator or Canva right now? Select a standard box style below to download a print-ready SVG with cut lines, crease rules, and 3mm bleed in 1 click.
A mailer box is cut from one sheet of corrugated board and folds into shape without glue or tape. The dieline shows that single sheet laid flat. Sizes are always given as inside length × width × depth, because the product has to fit inside.
Measure the product, add room for any insert or tissue, and enter that inside size. Download the SVG and place your artwork on its own layer under the cut and fold lines. Keep text and logos at least 5 mm inside every fold and cut so nothing gets trimmed or lands on a crease.
Print on the outside only, or on both sides for an unboxing reveal. Inside print is laid out on a mirrored copy of the same dieline.
The download is a starter template for laying out artwork. When you order, Cubit's structural team confirms the production dieline for your exact size and board before anything is printed.
The outline stays the same, but board thickness changes the fold allowances, so tell your manufacturer the board before final artwork.
| Choice | Typical use | What it changes |
|---|---|---|
| E-flute (about 1.5 mm) | Most e-commerce and subscription boxes | Thinner walls, sharper print, tighter folds |
| B-flute (about 3 mm) | Heavier or fragile products | Thicker walls, larger fold allowance |
| Kraft, white or printed liner | Brand look | White gives brighter colour; kraft mutes it |
| Outside only or both sides | Budget against unboxing | Inside print needs a second, mirrored artwork file |
Enter the inside length, width and depth in inches. Measure your product, add space for inserts or padding, and use that. Box makers quote and build from inside dimensions.
The template downloads as a layered SVG. It opens in Adobe Illustrator, Figma, CorelDRAW, Inkscape and Canva, with cut lines, fold lines, bleed and an artwork layer kept separate.
Yes. FEFCO 0427 is the international code for the roll-end tuck-front box most people call a mailer box. It ships flat and folds together without glue.
Use it to lay out and approve your artwork. Before production, the manufacturer confirms the final dieline for the exact board thickness, because fold allowances change with the board.
