Crush Proof Mailling Boxes makes it simple for businesses to design and order custom boxes and affordable packaging online. Get quality custom mailer boxes, shipping boxes and more for any need you might have. With quick turnaround and low minimums, we’re a leading wholesale box manufacturer for a reason. We think outside the box and build packages so good, you won’t be able to contain yourself (pun intended). We offer free die and plates, custom design, a variety of sizes, and fast turnarounds for all of our clients.

Dimensions All Custom Sizes & Shapes
Printing CMYK, PMS, No Printing
Paper Stock 10pt to 28pt (60lb to 400lb) Eco-Friendly Kraft, E-flute Corrugated, Bux Board, Cardstock
Quantities 100 – 500,000
Coating Gloss, Matte, Spot UV
Default Process Die Cutting, Gluing, Scoring, Perforation
Options Custom Window Cut Out, Gold/Silver Foiling, Embossing, Raised Ink, PVC Sheet.
Proof Flat View, 3D Mock-up, Physical Sampling (On request)
Turn Around Time 4-6 Business Days, Rush

Crush-Proof Mailing Boxes

6″ x 6″ x 6″ Crush-Proof Mailing Boxes are made with fiberboard with a white finish for increased durability. Crush-Proof Mailing Boxes are made of durable and long-lasting cardboard Each packet includes 100 boxes. It is also capable of carrying a weight of 200 lbs.

Dimensions: 6″ L x 6″ W x 6″ H
Bundle Quantity: 100 boxes per bundle
200 lb. test B-flute corrugated fibreboard with triple-fold sides
Easy to use – box snaps together and locking tabs seal box securely.

Crush-Proof Mailers fold together quickly and easily without the need for tape, glue or staples.  They are super strong and yet light-weight to save on postage.

  • Perfect for shipping small, light-weight fragile items.
  • Corrugated Mailers are manufactured from 200#-B oyster white corrugated.
  • When assembled, the mailer provides doublewall protection on three sides.
  • Unique “wave-rule” edge virtually eliminates paper cuts.
  • Dimensions below are inside dimensions.
  • All ship and store flat to save space.


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