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Design online

100% recyclable

Free UK delivery

Floating 3D model of three custom mailer boxes.
Custom branded mailer box.
Custom branded mailer box.
AI-generated 3D model of a dark grey branded mailer box.
AI-generated 3D model of a white branded mailer box.
AI-generated 3D model of pink branded mailer box on a wooden table.
AI-generated 3D model of a brown custom mailer box.
Custom branded mailer box.
White mailer box opened with Fenton branding on the inside. Branding is colourful and includes a message saying "with love x". The mailer box also includes double peel & seal.

Mailer Box

Minimum order quantity: 1000

Fully customisable, mailer boxes are ideal for shipping everything from clothing to cosmetics. They’re also FSC-certified and 100% recyclable, making them perfect for businesses looking for more sustainable packaging boxes. Extra features allow you to create a seamless unboxing experience.

  • Custom sizing
  • UV varnish
  • FSC certified
  • Inside: brown kraft
  • Free UK delivery
  • Outside print: 1 colour

Have questions? Contact us

Carbon footprint

See how the carbon footprint of our mailer boxes compare to a benchmark product.

How is this calculated?

Carbon footprint comparison between an eco mailer box, a premium mailer box and a benchmark product.

Specification

Materials
Emissions from an eco mailer box's materials. 73% 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. Wk

    White kraft

    FSC-certified, bleached paper made from recycled and virgin pulp. White kraft liner has a fibrous texture and a matte finish.
  4. 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..
  5. 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.
  6. 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.
  7. E

    E-flute

    E-Flute (1.5-2.0mm) is used for all Sourceful mailer boxes. It has great crush resistance for its weight, provides a flat surface for printing and is easy to fold.
  8. 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.
  9. Wd

    Water-based dye inks

    Made with water as their primary base, these inks are more sustainable than solvent-based inks.
  10. 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.
  11. 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.
  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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