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Design online

100% recyclable

Free UK delivery

Floating 3D model of three different branded premium mailer boxes.
Floating 3D model of a branded premium mailer box.
Floating 3D model of a pink and brown premium mailer box.
Floating 3D model of a dark blue and white premium mailer box.
Floating 3D model of a two-tone brown premium mailer box.
Floating 3D model of a blue and brown premium mailer box.
Floating 3D model of an orange premium mailer box.

Premium Mailer Box

Minimum order quantity: 1000

Premium mailer boxes are ideal for shipping everything from clothing to cosmetics. High definition printing offers exceptional quality and allows for vibrant and detailed designs. Foiling and other finishes give you the freedom to add unique flourishes for a striking unboxing experience.

  • Custom sizing
  • High definition printing
  • Foiling
  • Express 3-4 weeks
  • UV varnish
  • Economy (free) 8-11 weeks

Have questions? Contact us

How it works

Carbon footprint

See how the carbon footprint of our premium mailer box compares to our digital print mailer box and a benchmark product.

How is this calculated?

Carbon footprint comparison between a digital print mailer box, a premium mailer box and a benchmark mailer box. Digital print mailer box has a 50-90% smaller carbon footprint.

Reduce your carbon footprint by up to 12%

-8% CO2e

Custom sizing

Create custom-sized packaging online with Sourceful. Eliminate waste and reduce your carbon footprint. By reducing void space to half the industry average, you can reduce your total order carbon footprint by up to 8%.

-4% CO2e

Sampling

Visualise and proof your packaging online in Sourceful’s Design Studio and remove the need to order samples. By not sampling you could reduce your total order carbon footprint by up to 4%.

Specification

Understand your entire supply chain

Carbon footprint breakdown of a premium mailer box.
Materials
Emissions from a premium mailer box's materials. Approximately 44% of the total carbon footprint.
  1. F0

    FEFCO 0427

    Quick to assemble, FEFCO 0427 has a wide, flat interior surface which is ideal for branding or creating a memorable unboxing experience. FEFCO 0427 is durable in transit with each sidewall constructed from two layers of cardboard, providing excellent crush resistance.
  2. Bk

    Brown kraft

    FSC-certified, unbleached and uncoated paper made from virgin pulp. Brown kraft is the most sustainable material for these mailer boxes.
  3. Wc

    White coated

    FSC certified, bleached paper made from recycled and virgin pulp. Coated with kaolin clay to create a smooth surface for printing with a shine..
  4. Bt

    Brown testliner

    FSC certified and made from 100% recycled fibres, brown testliner is a cost-effective paper used on any non-printed, brown side of a mailer box. This reduces its carbon footprint and cost. Testliner isn’t printed on as colours can appear muted and finer details can occasionally blur because of its high absorption rate.
  5. Wt

    White testliner

    FSC certified and made from 100% recycled fibres, white testliner is a cost-effective paper used on any non-printed, white side of a mailer box. This reduces its carbon footprint and cost. Testliner isn’t printed on as colours can appear muted and finer details can occasionally blur because of its high absorption rate.
  6. Ef

    E-flute

    Commonly used for mailer boxes, E-flute is strong yet easy to fold.
  7. Vi

    Vegetable-based inks

    Made with vegetable oils as their primary base, these inks are designed for high-quality offset printing. More sustainable than solvent-based inks.
  8. Ws

    Water-based sealant

    Applied to every printed side of a mailer box. This is a standard part of the offset printing process to ensure colour consistency and avoid scuffing. Does not impact the recyclability of the box.
  9. Uv

    UV varnish

    Used to highlight printed features or create a high gloss, professional finish over an entire print area. UV varnish also protects colours and reduces the risk of colours running when wet. Mailer boxes with a UV varnish are widely recyclable.
  10. E

    Embossing

    Creates a distinctive raised effect to highlight features or add a luxurious finish. Available offline.
  11. F

    Foiling

    A metallic finish that highlights features and creates a premium feel. Available offline.
  12. Sp

    Single peel & seal

    One strip of adhesive covered with a fibre-based backing paper. A single peel & seal makes fulfilment fast and helps make your packaging tamper-proof. Adding a peel & seal has minimal impact on your carbon footprint.
  13. Dp

    Double peel & seal

    Two strips of adhesive covered with fibre-based backing paper. A double peel & seal makes fulfilment fast and returns easy for your customers.

Supply Chain

A resilient, responsible supply chain

Certifications

We validate all supplier claims and third-party certifications such as ISO, BRC and FSC. And we ensure suppliers adhere to UK and EU laws on chemicals and product components, like UK REACH. This allows businesses to confidently buy high-quality products that align with a net-zero trajectory.

Our mailer boxes are certified FSC Mix.

Vetted suppliers

We visit and vet every supplier we work with. We use our code of conduct to do this, which defines what we consider to be ethical working conditions. To work with Sourceful, suppliers and their manufacturing sites must meet this code. We then review their practices every year.

Learn more

Quality control

Every order from our suppliers undergoes a quality inspection process before it’s shipped. Any order that fails quality inspection is returned to the manufacturer or reproduced.

For orders manufactured internationally (outside the UK), we follow the Acceptable Quality Limit (AQL) method defined by ISO 2859 - 1.

For orders manufactured domestically (inside the UK), our suppliers perform the quality inspection process which we then verify through spot checks throughout the year.

Learn more

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