Personalised Letterbox Boxes 322mm x 229mm x 20mm White / Brown

Free delivery on orders over £99


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If you require a bigger order, contact us.

Personalised Letterbox Boxes  322mm x 229mm x 20mm (Internal Dimensions)

Introducing our superb Personalised Letterbox Boxes, designed to enhance your brand's presentation and leave a lasting impression on your customers. These carefully crafted mailer boxes combine functionality and aesthetics, ensuring that every delivery becomes a delightful unboxing experience.

These small, white large letter boxes with a single wall are the ideal size to abide by the Royal Mail's requirements for large letters. All of these huge letter posting boxes adhere to Royal Mail regulations by having a height, or thickness, no greater than 25mm.

Make sure not to overfill this huge letter box packaging since if you do, they might not adhere to these tight requirements. The maximum weight limit for cardboard large letter postal boxes is 750g, and the item's length and breadth cannot be greater than 353mm and 250mm, respectively.

Made from premium, sturdy materials, our custom postal boxes are built to protect and showcase your products with style. Each box is custom printed to your specifications, allowing you to add your brand's unique touch. Whether you want to display your logo, brand colours, or captivating designs, we can bring your vision to life.

With our state-of-the-art printing technology, we ensure that every detail of your artwork is faithfully reproduced on the letterbox boxes. Vibrant colours, sharp images, and precise text will captivate your customers and reinforce your brand's identity. Your printed mail boxes will make a statement even before they are opened.

Functionality is at the core of our personalised postage boxes. Easy assembly, ensuring that you can package your products swiftly and securely. The sturdy construction guarantees protection during transit, safeguarding your items from any potential damage. Whether you're shipping delicate electronics, cosmetics, clothing, or accessories, our mailer boxes provide the utmost care and security. We recommend pairing our custom stickers, printed packaging tape or custom printed tissue paper with your custom mailer boxes to finish off the complete brand experience.

We understand that every business has unique requirements, which is why we offer a range of sizes to accommodate various product dimensions. From small items to larger merchandise, we have the perfect size to fit your needs. The customisation options don't stop there—choose from various finishes, such as matte or gloss, to add an extra touch of elegance to your mailer boxes.

Our Personalised Letterbox Boxes are more than just packaging; they are an extension of your brand's personality. By investing in our high-quality boxes, you demonstrate a commitment to excellence and create a memorable unboxing experience for your customers. You can be confident that your products will arrive in style, leaving a lasting impression and fostering customer loyalty.

So, why settle for ordinary packaging when you can elevate your brand with our Personalised Letterbox Boxes? Stand out from the competition, make a statement, and create a remarkable unboxing experience that your customers won't forget. Contact us today and let us help you bring your brand to life through personalised packaging.

Postal printing is available in White Paper Outside & Brown Inside or Brown Paper Inside & Outside

We offer a number of delivery options for custom printed mailer boxes:

  • Standard Delivery (7 - 14 Business Days) Free
  • Express Delivery (5 - 7 Business Days) Additional fees apply*

Delivery times stated above are all from approval of artwork, free artwork, free standard UK mainland delivery (from a logo AI or PDF file)









Sustainably sourced

Premium Silk Paper

Digitaly Printed


Printed in UK

Digital Print

Full Colour Print


Product Code C5 White Width Internal Dims
Product Custom Printed Mailer Box Depth Internal Dims
Type Custom Mailer Box / E-commerce
Height Internal Dims
Print Yes Standard Delivery 7 - 14 Working Days
Colour Full Digital
Recyclable Yes
Custom Print Yes Biodegradable
Print Sides Inside / Outside / Inside & Outside
Material Kraft White Outside /  Kraft Brown Inside  
Origin UK Print Method Full Colour Digital Print
Material Flute Corrugated flute


Email for templates



Free Artwork Prep

Just send us your logo with your ideas and our expert designers will create your artwork and email it over for you to review. If you require any changes, don’t be afraid to let us know. Once you’re happy to proceed, give us the thumbs up and we move your order into production straight away.


Personalised Letterbox Boxes

  • Manufactured in the UK
  • Large letter posting boxes all have a height, or thickness, of no larger than 25mm. 
  • Eco-Friendly
  • Sustainable
  • MOQ Only 50 Boxes
  • Recyclable


Benefits of Postal Printing

  • Sides Printed - Inside / Outside / Inside & Outside
  • Free Standard Delivery 7 - 14 Days - Express available
  • Free Artwork - Let us take care of your artwork
  • No Setup Fees - No origination charge
  • Corrugated Board - Micro Flute 



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