Custom Mailer Boxes: What to Know Before You Order

A mailer box has one job a retail box doesn't: it has to survive a courier's hands and a truck ride before the customer ever sees it, while still landing as part of the unboxing experience rather than just a shipping container.

Built for shipping, not just storage

Our custom mailer boxes use high-quality E-flute corrugated cardboard and a roll end front tuck (REFT) design with dust flaps, built specifically for dependable shipping protection. Assembly is glue-free — no tape or wrestling required, which matters when you're packing orders at any real volume.

Kraft or white

You get a choice between a natural kraft finish, for an eco-friendly, minimal look, or white stock for sharp, vibrant full-colour (CMYK) graphics if your brand relies on bold printed design. Neither is more durable than the other — it's purely a look decision.

Where mailer boxes make sense

This format is built for e-commerce shipping, retail packaging that also gets mailed, promotional mailers, and subscription boxes — anywhere the box itself is part of what the customer experiences when the package arrives, not just what protects it in transit.

Sizing

Mailer boxes are available in nearly any size, so measure your product with a bit of extra room for any padding or inserts rather than an exact fit — a completely snug box makes packing slower and leaves no cushioning.

Ready to order

Get an instant price for your dimensions and finish on the mailer box product page.