Corrugated boxes · FEFCO 0427
16 × 12 × 4 in die-cut mailer box dieline
This dieline was generated at exactly 16 × 12 × 4 in (406.4 × 101.6 × 304.8 mm) by the same structural engine that produces our factory print files — every panel, flap and glue zone computed for this size, not stretched from a template. Need a different size? This construction runs in standard stock sizes — pick the nearest one in the studio.
What fits in 16 × 12 × 4 in
Multi-item orders: a full subscription box, folded garments, shoes, a mid-size kit.
Shipping note: carriers bill the greater of actual and dimensional weight. At 16 × 12 × 4 in the dimensional weight is about 5.5 lb (US domestic divisor 139), so if your product is lighter than that, the box size — not the product — is setting your freight cost.
Design on this 16 × 12 × 4 in dieline
Put AI artwork on the true structure at your exact size — then order it manufactured, one company end to end.
Start designing freeorGenerate a custom size16 × 12 × 4 in die-cut mailer box — questions people ask
What are the actual dimensions of a 16 × 12 × 4 in die-cut mailer box?
16 × 12 × 4 in is the FINISHED internal size — the space your product actually occupies. Flat, before folding, the die measures 912 × 807 mm (35.89" × 31.77"), which is the sheet size a printer needs to quote the job. That works out to 768 cubic inches (12.59 litres) of internal capacity.
What is the dimensional weight of a 16 × 12 × 4 in box?
About 5.5 lb at the US domestic divisor of 139. Carriers bill whichever is greater — actual weight or dimensional weight — so for anything light and bulky this is the number that sets your shipping cost. Dropping a dimension by an inch is often cheaper than negotiating a rate.
Can I get a 16 × 12 × 4 in die-cut mailer box custom printed?
Yes. Design it free on this exact dieline — the artwork lands on the real structure, not a mockup — and runs start at 100 units. You can also export the print-ready file and take it to any printer; the construction is FEFCO 0427, so any converter will recognise it.