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Key facts

  • Mailer postal boxes are sized to qualify as a Royal Mail Small Parcel and come in 19 sizes, in white or brown/kraft E-flute board.
  • Full-colour digital printing applies to pre-defined print areas - outside only, inside only, or inside and outside.
  • Boxes ship flat with strong folding tabs for tamper-resistant assembly, and every full order is approved via a printed sample first.

Frequently asked questions

What are mailer postal boxes made from?
Sturdy, triple-layer corrugated kraft board with a smooth, professional finish, FSC-certified with 60-90% recycled content.
What sizes are available?
19 internal sizes, from 102 x 102 x 102mm up to 400 x 330 x 40mm (Width x Depth x Height), with 10-20mm tolerance due to manufacturer variance.
Are these boxes sized for Royal Mail postage?
Yes - they're sized to qualify as a Royal Mail Small Parcel, helping you avoid failed deliveries.
Where can I print my design?
Full-colour digital print is available outside only, inside only, or inside and outside, in pre-defined print areas.
How do the boxes go together?
They ship flat and assemble quickly, with strong folding tabs and flaps for a secure, tamper-resistant seal.
Can I order a sample first?
Yes - a printed sample fee is refunded against a matching first full order (no proof sent for a single sample), or order a blank sample for a couple of pence.
Is there a minimum order or set-up fee?
Minimum order quantities are low, with a one-time £49.95 set-up fee auto-added to orders under £100 - not charged again on repeat orders with unchanged artwork.
How quickly will my order arrive?
Choose same day (local, subject to availability), next day, or standard 3-5 day delivery at checkout, with free mainland UK delivery available.

Testimonials

Caroline Rowland

"I was in a jam and needed 600 bags with our label next day- this team was so amazing and got them done in time. Cannot recommend them enough! Superb quality as well."

Megan Brown

"Fantastic service, really speedy and great quality. Would 100% recommend especially if you're in need of a quick turnaround!"

Tash Turner

"Ordered some personalised boxes for my little company and I couldn’t be happier. Really easy and efficient system to design your own boxes and printed exactly as I wanted. Great service. Will be 100% ordering more in the super near future."

Talking Birds

"Really clear guidelines, image upload and proofing system. Very good communication and really happy with the results."

T Odugbemi

"Really awesome service from the team at FPP. We are a returning customer and recommend."

Why Choose Us

Fast Delivery Promise
1.

Free UK Delivery Available

Choose from a few delivery options including FREE delivery to mainland UK.

Pre-Print Artwork Approval
2.

Pre-Print Artwork Approval

All printed orders will receive an email proof prior to printing.

Based & Printed in the UK
3.

UK Based

All products are printed and made in the heart of England, keeping our carbon footprint as low as possible.

5 Star Support
4.

5 Star Support

If you're not sure or need help, get instant support via our CONTACT PAGE.

Fast Custom Printed Boxes for UK Businesses

Fast Printed Packaging

Single Walled Cardboard Boxes

Range of single wall cardboard boxes. Print all 4 sides.

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Double Walled Cardboard Boxes

Range of double wall cardboard boxes. Print all 4 sides.

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Magnetic Boxes

Range of brown and white luxurious magnetic boxes.

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Small Parcel Mailer Boxes

Range of white and brown small parcel mailer boxes available. Print inside & outside of all boxes.

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Large Letter Mailer Boxes

Range of white and brown large letter mailer boxes available. Print inside & outside of all boxes.

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Telescopic Boxes

Range of telescopic cardboard boxes. Print inside & outside.

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Wine Bottle Boxes

White and brown wine bottle cardboard boxes available. Print inside & outside of the box.

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Flexi-Hex® Bottle Sleeves

Brown Flexi-Hex® cardboard bottle sleeves available. Print both sides of the sleeve.

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