Custom Mailer Boxes — Supplied Agency
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Custom Mailer Boxes

Full-colour printed mailer boxes with inside and outside print. The packaging your customers actually see — designed to create unboxing moments that drive retention and shares.

CMYK + Pantone
Full Colour
In+Out
Both Sides
From 500 Units
MOQ
E/B
Flute
Custom Mailer Boxes showcase — Supplied Agency
Why custom mailer boxes

The unboxing moment starts here

Create a great unboxing experience

Inside & Outside Print
Custom Sizing
Premium Finishes
Designed for customer retention
Features

Built to protect. Designed to impress

Crashlock Base

Crashlock Base

Snaps into shape the moment you open it. Up to 60% quicker to assemble than a standard mailer box.

Peel & Seal / Tear Strip

Peel & Seal / Tear Strip

Seals in seconds on the fulfilment line. Opens cleanly on the doorstep. No extra steps at either end.

Custom Inserts

Custom Inserts

Shaped to hold your product exactly where it should be. No void fill, nothing that looks like an afterthought.

Inside & Outside Print

Inside & Outside Print

CMYK or Pantone. Outside handles the subtle doorstep moment. Inside is where the brand story lands.

E-Flute or B-Flute Board

E-Flute or B-Flute Board

E-flute as standards or a sturdier B-flute for product that needs more protection in transit.

Colour Matched Print

Colour Matched Print

Exact colour matching to your brand colours. Consistent for each production. Pantone or unique.

Custom Mailer Boxes lifestyle — Supplied Agency
Specifications

Built to your exact requirements

Every custom mailer boxes is engineered from scratch for your product, brand identity, and customer experience.

Technical Specifications

MaterialE-Flute or B-Flute Corrugated
PrintPantone match + CMYK Full Colour (Inside & Out)
FinishesGloss/Matte Lamination, Spot UV, Foiling
MOQ5000 units
AssemblyCrashlock (Peel and Seal) + Standard tuck closure
SustainabilityFSC® Certified, Recyclable
FAQ

Common questions about custom mailer boxes

Everything you need to know before ordering custom custom mailer boxes.

What's the difference between a mailer box and a shipping box?

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A mailer box is what your customer sees — it's designed for the unboxing experience with tuck-in flaps, self-locking tabs, and full-colour print inside and out. A shipping box (0201) is the outer transit packaging designed primarily for protection. Many ecommerce brands use a mailer box as the primary packaging, or a mailer box inside a plain shipping box for extra protection on fragile products.

Can I print on both the inside and outside?

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Yes — this is one of the key advantages of custom mailer boxes. Outside print handles brand recognition on the doorstep. Inside print creates the surprise and delight moment when the box is opened. We recommend using the inside for your brand story, social media handles, QR codes, or a thank-you message. The inside print is where the emotional connection happens.

What's the minimum order for custom mailer boxes?

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From 500 units with digital printing. This makes custom mailer boxes accessible even for smaller brands or product launches. At higher volumes (2,000+) we can switch to litho-laminated production which reduces the unit cost significantly. We always price both options so you can choose based on your budget and volumes.

Do I need to use tape with a mailer box?

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Not necessarily. Our mailer boxes have many features but our peel and seal feature means you can secure the box without the addition of extra tape on your packing lines.

How much do custom mailer boxes cost?

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A small large letter size box with digital print on the inside and outside of the box typically starts from around £1.50–3.50 per unit at 250 quantity, depending on size and finishes. At 2,000+ units the cost drops noticeably, and at 5,000+ with either Flexo or litho printing options, it reduces further. We provide fully transparent quotes with line-by-line breakdowns covering print, material, finishing, and delivery.

Ready to create premium custom mailer boxes?

Tell us about your project. We'll come back with a transparent quote, timeline, and sample plan within 48 hours.