

The real blank at this size, folded by the same engine as the studio. The artwork is a sample from a fictional brand — swap in your own in the editor.
Returnable shipper 400×300×250 dieline
Locks shut by hand at both ends; the customer reopens and relocks the top to send it back. A ready-sized preset of the double lock box — change the length, width and height and every panel, tuck and glue flap is redrawn to match.

Sign in to download. Dieline downloads are part of Pro: PDF, Illustrator, SVG and DXF, cut, crease and bleed on separate layers, without a watermark. See plans
- Reference
- FEFCO 0220
- Inside size
- Length 400 · Width 300 · Height 250 mm
- Size range
- Length 100–1000 · Width 60–700 · Height 50–1000 mm
- Manufacturing
- 403.2 × 303.2 × 256.4 mm score to score · inside vs outside sizes
- Parts
- One blank
- Board area
- 0.740 m²
- Default board
- B-flute shipping · 3.2 mm caliper
- Board options
- B-fluteEB doubleE-flute KE-flute WF-flute
- Good for
The flat dieline
Exactly what the downloads contain, drawn from the template at its default size, with a 3 mm bleed. How to read a dieline.
- Crease
- Cut
- Glue area
- Bleed 3 mm

How the blank is sized
Score-to-score panel sizes of this FEFCO 0220 blank at the default size, with the formula each one follows. L, W and H are the inside dimensions; T is the board caliper (3.2 mm for B-flute shipping). Change the size or board in the editor and every panel is recalculated.
| Panel | Size (mm) | Formula |
|---|---|---|
| Front | 403.2 × 256.4 | L + T × H + 2T |
| Left side | 303.2 × 256.4 | W + T × H + 2T |
| Back | 403.2 × 256.4 | L + T × H + 2T |
| Right side | 300 × 256.4 | W × H + 2T |
| Glue flap | 32 × 256.4 | – × H + 2T |
| Snap end ×2 | 303.2 × 100 | W + T × – |
| Snap end ×2 | 300 × 100 | W × – |
| Snap bottom | 403.2 × 195 | L + T × – |
| Snap tuck ×2 | 403.2 × 191.8 | L + T × – |
| Snap top | 403.2 × 195 | L + T × – |
Adjustable in the editor
Beyond the size and board, this structure exposes 3 options; the template and 3D preview follow each change.
- Tongue widthmm
- Tongue heightmm
- Hand holeson / off
The double lock box family
The same structure with sizes, boards and options set for a use.

Preset
Preset
Similar structures
Other structures built in a similar way, matched on code family, category, closures and proportions.
Make this returnable shipper 400×300×250 yours
Open it in the editor to set your size, drop artwork on each face, check bleed and safe areas, and export print-ready PDF with the dieline on its own layer — or stage it in a 3D scene for a mockup.





