Description
Custom mailer boxes are self-locking corrugated shipping boxes printed with your brand logo and colors on the outside, inside, or both. US e-commerce brands, subscription box companies, and DTC businesses use them to ship products safely while turning every delivery into a branded touchpoint. At Packaging Ship, custom mailer boxes wholesale are available from 50 units with no minimum order, no die charges, and free FedEx or UPS shipping to any address in the continental United States.
What Makes a Mailer Box Different From a Shipping Box?
A standard shipping box uses slotted flaps that require tape to close. A mailer box uses self-locking interlocking flaps, no tape, no glue, no assembly tools. The box holds itself shut through tension, which means faster packing at dispatch and a cleaner opening experience for the customer.
Mailer boxes are also designed for presentation. The inside face is fully printable, which means your brand identity continues the moment the customer lifts the lid. Shipping boxes are designed for volume transport. Custom mailer boxes are designed for the moment a customer receives something.
E-Flute vs B-Flute: Which Corrugated Is Right for Your Product?
The flute is the corrugated layer inside the box wall. It determines crush resistance, box weight, and print quality. At Packaging Ship, custom mailer boxes are available in two corrugated types:
- E-Flute (1.5mm wall thickness)
Lighter weight, smoother exterior surface, better print quality. The right choice for lightweight products, cosmetics, apparel, accessories, small electronics, where print sharpness matters more than heavy-duty protection.
- B-Flute (3mm wall thickness)
Thicker wall, higher crush resistance, better stacking strength. The right choice for heavier products, fragile items, or orders that go through multiple transit points before delivery.
Not sure which flute your product needs? Tell us the weight of your product when you request a quote and we will specify the correct corrugated type. Every order at Packaging Ship, including our full range of corrugated boxes, is spec’d for the actual product going inside it.
Custom Mailer Boxes With Inside Printing: What It Does and When to Use It
Inside printing turns the interior of your mailer box into a brand experience. When the customer lifts the flap, they see your brand colors, a message, your social handles, or a ‘thank you’ printed directly on the inner face of the corrugated wall. This is not a sticker or an insert, it is printed directly onto the box material at the same time as the exterior.
Inside printing increases brand recall and social sharing. Customers photograph unboxing moments. A mailer box with a branded interior is photographed more than a plain brown interior. For subscription box companies and DTC brands building repeat purchase behavior, inside printing is one of the highest-ROI changes you can make to your packaging.
Available as outside only, inside only, or full outside and inside CMYK printing. Pantone (PMS) color matching available for brand-critical colors on offset print runs.
Who Uses Custom Mailer Boxes From Packaging Ship?
Custom mailer boxes from Packaging Ship are used by four main types of US businesses:
- E-commerce and DTC brands
Shopify and Amazon sellers who ship direct to consumer and need branded packaging that reduces return rates and drives repeat orders. Corrugated mailer boxes with CMYK exterior printing and a branded interior message.
- Subscription box companies
Monthly subscription brands that need subscription box packaging wholesale at consistent print quality across large runs. Customers expect the same box quality every month, offset printing with Pantone matching delivers this consistency.
- Cosmetic and skincare brands
Brands shipping glass, serum bottles, and delicate cosmetic products that need E-Flute corrugated for print quality and a custom die-cut insert inside to prevent lateral movement in transit. Packaging Ship produces the box and the insert in one order.
- Small businesses testing a new product
Custom mailer boxes for small business orders from 50 units with no minimum order penalty. Digital printing for quantities under 500 units, offset printing for quantities above 500 units. No setup fees on either method.
Materials, Printing, and Finishing Options
Every custom mailer box at Packaging Ship is produced in corrugated cardboard, either E-Flute or B-Flute depending on your product weight and shipping route. Kraft exterior is available for brands using natural, unbleached packaging as part of their brand identity.
Printing options: CMYK full-color digital printing (50–500 units), offset printing with Pantone PMS matching (500+ units), outside only, inside only, or full inside and outside. Finishing options include matte lamination, gloss lamination, soft-touch lamination, spot UV, and embossing, all available on mailer box exteriors.
If your order requires custom die-cut packaging inserts to secure your product inside the mailer box, these can be added to your order as foam inserts, cardboard inserts, or molded pulp inserts. Specify this when requesting your quote.
Eco-Friendly Mailer Boxes, What Is Verifiable and What Is Not
Most packaging suppliers describe their products as eco-friendly without specifying what that means. Here is what Packaging Ship can verify on custom mailer boxes:
- Corrugated cardboard is recyclable
100% of the corrugated used in our mailer boxes is recyclable through standard curbside recycling in all 50 US states. No special recycling facility required.
- Kraft exterior is unbleached
Kraft mailer boxes use unbleached natural fiber. No chlorine bleaching process in the paper production.
- Water-based and soy-based inks available
Digital printing uses water-based inks. Soy-based ink formulations available on request for offset runs.
We do not describe corrugated mailer boxes as biodegradable, corrugated breaks down, but the timeline depends on conditions. What we confirm is recyclable, and that is a checkable, verifiable claim.
How Long Does a Custom Mailer Box Order Take?
A standard custom mailer box order at Packaging Ship takes 7 to 10 business days from proof approval to production completion, plus 2 to 5 business days for free FedEx or UPS delivery to your address in the continental United States. Total time from order placement to delivery at your door is typically 10 to 15 business days.
Rush production in 4 to 5 business days is available on most mailer box sizes at an additional charge. If you have a product launch date, a trade show, or a shipping deadline, include that date when requesting your quote and we will confirm whether rush production is available for your specifications.
Part of Packaging Ship’s Full Range of Custom Packaging Boxes
Custom mailer boxes are one product in Packaging Ship’s full range of custom packaging boxes produced for US businesses. The same no-minimum, no-die-charge, free-shipping model applies across every product type, from rigid boxes and folding cartons to display boxes and accessories. If you need more than one packaging format for different products or shipping scenarios, we produce all types under one order with one production timeline.
Brands that ship products needing counter display at retail use our custom display boxes alongside their mailer boxes, same brand colors, same print quality, one supplier.






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