Auto-Fold Mailer
Auto-fold (crash-lock) mailers that pop open and lock in one motion — built for high-volume e-commerce fulfillment where pack-out speed matters. Custom size and print, same self-locking, tape-free closure as a standard mailer.
At-a-glance specs
- Structure
- Crash-lock base, self-locking mailer top
- Board grade
- B-flute · E-flute · EB-flute · Kraft
- Thickness
- 1.5 – 3.0 mm (32 – 44 ECT)
- CMYK + Pantone, inside & outside
- Finishes
- Matte / gloss / soft-touch / foil / spot UV
- MOQ
- 500 units (sample: 1)
- Lead time
- 8 – 12 business days + shipping
Opens and locks in one motion
Crash-lock base
The base snaps square automatically — no folding, no taping.
Fast pack-out
One motion erects and closes; built for pick-and-pack volume.
Tape-free closure
Self-locking top keeps the unboxing clean.
Still printable
Full-color inside and out, CMYK + Pantone.
What is an auto-fold mailer?
- (‘Crash-lock base — erects square in one motion, no folding.’, ‘Self-locking top — closes tape-free.’)
- (‘Throughput — seconds per unit at pick-and-pack scale.’, ‘Brandable — full-color inside and out.’)
Specifications
| Structure | Crash-lock base — auto-erecting, self-locking top |
|---|---|
| Board grade | B-flute · E-flute · EB-flute, tuned to product weight |
| Material | Kraft · White-top Kraft · 100% recycled corrugated |
| Printing | Offset CMYK + Pantone · HD digital · full-bleed |
| Finishes | Gloss / matte / soft-touch lamination · foil · emboss · spot UV · window |
| MOQ | 500 units — price breaks at 1k / 5k / 10k+ |
| Turnaround | 8–12 business days after approval · rush available |
| Free with quote | Custom dieline + physical sample or 3D mockup |
Corrugated board thickness
The flute is the wavy layer between the liners — it decides how thick, stiff and protective your box is.
Frequently asked questions
Auto-fold vs standard mailer? +
Is it faster to pack? +
Does it still lock tape-free? +
What is the MOQ? +
How fast can I get them? +
Our Ordering Process
Four simple steps from first inquiry to boxes at your door.
Send inquiry
Tell us size, qty, material & artwork. Get a firm quote + free dieline in 24h.
Proof & sample
We send a digital proof or physical sample for your sign-off before production.
Production
Printed and finished in 8–12 business days with rigorous quality checks.
Delivery
Flat-packed and shipped worldwide, with tracking and after-sales support.
What brands say about our auto-fold mailers
High-volume DTC teams use auto-fold mailers to cut pack time per order without losing the premium unboxing.
“PackagingSmith nailed our corrugated boxes on the first proof. The print quality beats our old supplier and the dieline was free — exactly what a growing brand needs.”
“We reordered four times in six months. The board feels solid in hand and the closures stay tight every time. Customers think the box costs more than it does.”
“Switched from a local printer and saved around 22% on landed cost. The free dieline caught a structural issue before we hit tooling. Worth it on the first run alone.”
Faster fulfillment
The crash-lock base erased the manual fold — our pack team ships more orders per hour with the same headcount.
See options → Premium still lands
Customers get the same clean, tape-free presentation as our standard mailer.
Start customizing →From 1k to 50k
One dieline carries the whole program; re-orders keep spec identical.
See options → Customers also bought
Complete the unboxing — most orders ship together with these add-ons.
Custom Tissue Paper
Branded inner wrap that turns delivery into an unboxing moment.
View tissue →
Stickers & Labels
Seal tissue, brand the closure or add a thank-you touch.
View stickers →
Pillow Boxes
Light inner packaging for accessories and small gifts.
View pillow boxes →
Rigid Drawer Boxes
Premium inner box that ships safely inside your carton.
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