A mailer box is a self locking corrugated box with side wings that fold in and a front flap that tucks closed, so it ships without tape and opens cleanly. It is the box behind most subscription and ecommerce unboxing, because it protects the product and doubles as branded packaging.
The anatomy of a mailer box
A mailer is die cut from a single corrugated sheet. The base folds up into walls, the side wings fold inward for a double thick edge, and the front panel tucks into the base to lock it shut. That structure gives it strength at the corners without any tape or glue.
Why brands use mailer boxes
They survive transit, they print full color inside and out for the unboxing moment, and they assemble fast. That combination is why they dominate subscription boxes, ecommerce, and press kits.
Order custom mailer boxes
We print custom mailer boxes, corrugated boxes, ecommerce boxes, and bubble mailers for lighter items, all no minimum order with a free proof.
More packaging explainers: rigid boxes, corrugated cardboard, kraft paper, mylar bags, dielines, folding cartons, stand up pouches, spot UV, embossing, foil stamping.
Free tool: use our dimensional weight calculator to see your billable shipping weight and how a right sized box lowers it.
Ready to order? Explore our custom mailer boxes with no minimum order: Bubble Mailers Bags, Vinyl Record Mailers, Luxury Mailer Boxes, Ear Lock Mailer Boxes, and Candle Shipping Box.