Custom Ear Lock Mailer
Most shipping formats ask you to choose between speed and security. A plain tuck end folds fast and pops open under weight. A taped carton holds well and costs you time at the bench. The ear lock mailer sits between them, using two folded tabs to lock the structure without any tape at all. We produce a lot of these at ZEE Packaging and that middle ground is exactly why operators like them.
Tension Instead Of Adhesive
An ear lock mailer holds itself closed mechanically.
- Two tabs fold into slots and stay under tension
- Nothing is glued, so nothing arrives pre assembled
- No tape means one less consumable at your packing station
- The base stays square rather than splaying under a load
- It ships completely flat, which keeps storage minimal
- Recycles as a single clean piece with no adhesive residue
Most brands who switch to an ear lock mailer do so after getting frustrated with taping every parcel by hand.
Getting The Slot Right
The whole format depends on one small tolerance.
- Too tight and staff fight with it on every parcel
- Too loose and the tab releases somewhere in transit
- Board thickness changes how the tab behaves in the slot
- Heavier contents need a deeper tab engagement
- The slot must be cut cleanly, since a ragged edge tears
- We sample the fit physically rather than trusting a drawing
- Standard depth the everyday ear lock mailer
- Shallow format for books, prints and flat goods
- Deep format taller products and multi item orders
- With a tuck top locking on both ends
- With a die cut insert holding fragile contents steady
- Printed interior version branding on the inside face
Sizes We Print Regular
Every ear lock mailer is built to your product, though these run often:
- 6" x 4" x 2" for small items
- 8" x 6" x 3" for a standard order
- 10" x 8" x 4" for a mid size product
- 12" x 9" x 3" for apparel
- 9" x 6" x 2" for books and prints
- 14" x 10" x 5" for larger orders
Send us the filled weight along with the dimensions, since the tab engagement follows from the load rather than the footprint.
Board And Print
- E flute corrugated for lighter contents
- B flute where the product carries weight or gets stacked
- Kraft corrugated for a plain, cost effective outer
- White corrugated where you want brighter print
- Litho laminated for full color across the whole surface
- One color flexo, the cheapest branded route by a distance
Interior print is worth the small extra here. It costs a fraction of outer print and it is what customers photograph when the box opens.
Materials That Reduce Waste
- Recycled corrugated, standard across these grades
- FSC certified board, certificate available on request
- Soy based ink through the whole run
- No glue or tape, which keeps recycling completely clean
- Paper void fill instead of plastic
- Right sizing so you are not shipping empty space
How We Handle Your Order
- 100 unit minimum, so a small brand can test the format
- Free 3D mockup and flat proof before anything prints
- Free dieline drawn by our own designer
- Physical sample on request to check the lock under load
- Urgent turnaround at 5 to 8 business days
- Free shipping worldwide, including to your fulfillment center
Frequently Asked Questions
How long does assembly take?
A couple of seconds once the technique is learned. Slower than a crash lock, far faster than taping a plain carton.
Will it hold heavy contents?
At the right board grade, yes. Tab engagement has to suit the weight, which is why we ask for filled weight upfront.
Do we need tape as well?
Not for the base. Some operators add a strip on the top flap for tamper evidence, though the lock itself does not need it.
Is it cheaper than a glued format?
Usually, since there is no gluing stage in production. You trade a little assembly time for a lower unit price.
Does it ship flat?
Completely, with nothing pre glued. That keeps your warehouse space requirement to almost nothing.
How much is an ear lock mailer?
Rough estimate is $0.30 to $0.85 per unit for a plain kraft format, $0.50 to $1.30 with one color print and $0.90 to $2.20 for full color at moderate quantity. Size moves it. Shipping is included in our price. This is estimate only, so ask our team for a exact quote.
Can the inside be printed?
Yes, and we push for it. That surface is what appears in unboxing photos and videos.
