Custom printed boxes from as little as 25 pieces

Letter Box – Light Colour 2 sides

Specifically engineered to fit effortlessly through letterboxes, our e-commerce Letterbox mailer boxes eliminate the need for in-person deliveries or trips to the post office. Customers can conveniently receive their orders right at their doorstep, enhancing the overall shopping experience and fostering customer satisfaction.

Product ships in:

6-7 business days

Curious to try before you buy?

We understand! That’s why we’re excited to introduce our sampling service. Get started for just £20, including delivery. Plus, if you love what you try and decide to dive into box heaven, we’ll provide a coupon code to cover the cost of your samples.

How to order

Upload your file

Download the Dieline templates to apply your graphics and images. Attach your completed artwork by clicking on the “Upload you artwork” button, then Add to basket to complete your purchase.

Design online

Use our 3D Design studio to create your artwork and see your box in 3D!

Click on “Customize This Design” button above

Custom Printed Letterbox Mailer Boxes

Letterbox friendly Mailer Boxes are just that – Letterbox friendly! Specifically designed to fit through the standard Mailox. 

Mailer Boxes are meticulously designed to ensure the safe delivery of your products. Crafted from durable corrugated cardboard, these boxes act as a buffer, shielding their contents from potential impacts and bumps encountered during shipping. The ability to print on both the interior and exterior surfaces adds value to your offering, creating a unique unboxing experience for your customers.

Welcome Kits and Sample Packages in Mailer Boxes

Our mailer boxes, made from rigid and resilient corrugated cardboard, provide excellent insulation and safeguard their contents from external shocks. These versatile boxes can be utilised for a wide range of products, as well as for creating captivating welcome kits for distribution at corporate events and trade shows. Additionally, they can be employed to curate sample packages, allowing you to share your products with potential customers. With our printing services, you can customisse Mailer boxes with your unique branding, graphics, and creative messaging, ensuring a memorable experience for the recipient.

Customised Mailer Boxes: Unleash Creativity for Businesses

Boxed Easy is the ideal printing partner for promoting brick-and-mortar shops and e-commerce businesses alike. With over two decades of experience and cutting-edge printing technology, we ensure the highest quality products. Remember, packaging plays a crucial role in shaping the overall shopping experience for consumers. Imagine the excitement and anticipation customers feel during the unboxing process, often captured and shared on social media platforms. By offering original and unexpected packaging designs, you can create an engaging experience that captivates the recipient. Utilise the exterior and interior surfaces of our new cardboard mailer boxes to unleash your creativity and bring your innovative ideas to life!

Ordering Letterboxes from Boxed Easy

To place an order for custom printed Letterbox Mailer Boxes, simply select the size above and either design your own with our 3D design studio by clicking on the Customize this design button or download the box dieline template down below and upload this completed artwork at checkout. 

If you have any questions about our Letterbox Mailer Boxes or about placing your order, please do not hesitate to contact our Customer Support team, who will be happy to help.

Design online with a 3D Preview

Ready to start creating? Choose your size, then  customise or upload your own unique design. For the best quality print, make sure your images are clear, vibrant and have a high resolution. With our BoxedEasy design studio, you’ll be able to check your product boxes from every angle to make sure they’re just the way you want. When you’re finished, we’ll have your custom product boxes delivered to you ready to turn some heads.

Letter Boxes size guide

Related Products

Instant Pricing

We've created pricing for popualar sizes and the most requested quantities

Designed for E-commerce

These mailer boxes are ideal for shipping lighter items


Corrugated packaging uses a minimim of 70% recycled material and can be fully recycled

Made in the UK

Proudly made in the UK

Artwork Template Downloads

LetterBox Templates


We have chosen the most popular sizes here to offer you. If you cannot find a size that suits your needs, please fill in the quote request form here:

This refers to the amount of printing that will be done on this box.

We will print your logo or text on one side only of the box on Kraft Corrugated Board.

This refers to the amount of printing that will be done on this box.

We will print your design in Colour (with a maximum of 50% coverage) on one side only of the box on White Corrugated Board.

This refers to the amount of printing that will be done on this box.

We will print your logo or text in White Ink on one side only of the Kraft box.

When we are printing in Colour on Corrugated material, the best reproduction is produced using white board.

Normal processing time for printing and making of your boxes is 6 – 7 working days from confirmation of your artwork plus 2 days for delivery.

Our corrugated box products are all made from a minimum of 70% recycled content with the balance sourced from sustainable sources who are FSC (Forest Stewardship Council) accredited.

Mailer boxes are 100% recyclable.