Free packaging advice. Ask an expert about size, board and print before you order.

Custom printed mailer boxes

A mailer box is the shipping box that is also your branding. It arrives in one piece, opens without scissors and fits the cheapest postage band that your product allows.

  • From 50 units
  • Print inside and outside
  • Postage band checker on this page
  • Eco and recycled board options
Standard mailer illustration

We make E-flute corrugated mailers in kraft and white with full color print outside and inside, sized from letterbox flats to apparel boxes.

Mailer boxes and packaging

6 products

Create your personalized mailer box in the 3D Studio

Design in the Studio

Not sure of the size? postage band checker

Check your size

Prices are estimates for the default options. Pick size, board, print and finish on a product page for your own total.

Materials for mailer packaging

The board changes the look, the feel and the recycling story.

Kraft E-flute corrugated

Strong and natural looking. Colors print slightly deeper.

White E-flute corrugated

Brighter, truer color for full-color print.

Recycled liner E-flute

Recycled content with a mottled look.

Compare FSC, recycled, kraft and white board

From artwork to doorstep

  1. 1

    Design

    Download the dieline or use the 3D Studio.

  2. 2

    Check

    We review bleed, color and fonts for free.

  3. 3

    Approve

    You approve a digital proof. Samples are optional.

  4. 4

    Produce

    About 12 working days at standard speed.

  5. 5

    Ship

    You get tracking and a delivery estimate.

Questions about mailer boxes

What is the difference between E-flute and B-flute?

E-flute is thin (about 1.5 mm) and prints well. B-flute is thicker (about 3 mm) and protects better. Most mailers use E-flute. Heavier or fragile items may need B-flute or a double wall.

How do I choose the right size?

Measure the packed product, add padding, and check the result against your carrier limits. The postage checker on this page tests your size for common UK and US bands.

Can I print inside the lid?

Yes. Inside print is one of the most popular upgrades. It turns the unboxing into a branded moment.

What is the minimum order?

Mailers start at 50 units on selected sizes and 100 on others.

Are mailers recyclable?

Corrugated mailers with water-based ink and no plastic film are normally accepted in paper recycling. Check local rules before making a recyclability claim.

How strong are they?

E-flute mailers are suitable for typical parcel shipping up to a few pounds. Tell us the packed weight and we will advise.

More packaging formats

Packing something specific?

Tell us your mailer product and the quantity. An adviser replies with a size, a board and a price, usually within one working day.