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Letterbox Postal and Mailing Boxes

Our fully recyclable Mailer Boxes are perfect for your eco-conscious customers.

With customisable branding, messaging, and graphics on durable E-Flute material, your parcels arrive undamaged and make a lasting impression. Designed to fit standard UK letterboxes, our professional letterbox packaging ensures convenient delivery. Let your brand shine with SM1 Print Studio's custom Mailer Boxes, spreading your message far and wide.

Want to take your unboxing experience further? Be sure to check out our full range of Packaging Supplies.

  • 3 styles available
  • Letterbox friendly
  • Large letter sizes available
  • Fully recyclable material

Uses: Retail and eCommerce packaging, gift boxes, press kits and more.

Top tip: Looking to minimise postage costs? Opt for one of our Royal Mail Large Letter friendly mailer boxes.

Artwork tip: Create patterns and shapes that extend across the entire surface area of the box for a seamless look.

At SM1 Print Studio, we're here to tackle any question, no matter how big or small. We understand that ordering print can feel like a challenge, but fear not! We're here to make it a breeze. If you can't find the answer you're looking for in the FAQs below, don't hesitate to reach out to us via email or telephone. Local? You can pop into our Studio and we can show you samples of our amazing work. We absolutely love connecting with people, so don't be shy!

Do you offer letterbox-friendly options?

Choose from our Royal Mail Large Letter mailer boxes, available in two sizes: 255 x 168 x 22mm or our 100 x 100 x 22mm box. They're perfect for hassle-free deliveries right through the letterbox!

Do you sell flower postal boxes?

When placing your order at SM1 Print Studio, simply select our 182 x 600 x 35mm capacity flower postal box, and your flowers will be protected and beautifully presented during transit.

I only require a small quantity?

We understand the importance of catering to all needs, big or small. You can order as few as five copies, so you get precisely what you need without any excess.

How sturdy are the boxes for postage?

Our Postal Boxes at SM1 Print Studio are top-notch when it comes to durability. We print them on White E-coated Fluted Boards, making them incredibly sturdy. Rest assured that your packages will stay safe and intact during transit.

Are they guaranteed to fit through a letterbox?

Absolutely! We design and manufacture all our postal boxes at SM1 Print Studio to fit through a standard UK letterbox. No need to worry about missed deliveries or having to rearrange - your parcels will slide right through the letterbox with ease!

We Design for You

Our Graphic Design Service

Discover the limitless creativity of SM1 Print Studio! Our vibrant team excels in graphic design, from captivating logos to comprehensive brand guidelines.

Whether it’s eye-catching Flyers or polished Brochures, no challenge is too big or small. Let us bring your vision to life with bespoke designs. Get ready to be amazed! Contact our friendly and dedicated team today to embark on an exhilarating design journey like never before. Your ultimate creative experience awaits at SM1 Print Studio!

Find out more about our design & digital services.

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What Our Customers Think of Us

Sam and the team at SM1 have been amazing both times we've used their printing services. The team has gone above and beyond to help us deliver our events, everyone we have dealt with has been very responsive and helpful. For our last event, Sam helped us sort out some bespoke boxes for a parliamentary hand-in, and found a cost effective and high quality solution for the project. Really appreciate the time and effort SM1 puts into helping their clients, and highly recommend to anyone looking to use their services!
daniel williams
daniel williams
i recently requested a quotation for an A2 print print for a wedding picture, I can not recommend SM1 print enough they were helpful and there online quotation method is quick and incredibly easy to use there was no messing around within an hour i had a quote and price they requested i send the picture via email so no need to leave the house and i was told it will be ready to collect on Friday i had an email on Thursday saying my print was ready The team at SM1 print are quick and polite and the quality of the print was was clear and beautiful i have recommended SM1 prints to family that are waiting to get there pictures printed and i will also be back to get more printed i had also recently used them for my table plan and table name cards and these were also brilliantly done the pricing compared to other printing companies was below i expected and have been quoted at other places thank you SM1 prints for the amazing prints five stars all round
Andrew Stone
Andrew Stone
I am extremely impressed with the service and friendliness of the staff. The job was, in my opinion, small; they printed my "Father if the Bride" speech, but it was done so well and I am so pleased with the result. I would recommend SM1 Print Studio to anyone needing any type of print job. Thank you so much.
Laura Easterbrook
Laura Easterbrook
This team were soooo incredible. So responsive and helpful and really made everything as stress-free as possible and when you’re planning a wedding that’s precisely what you want. Pauline esp went above and beyond. I would recommend SM1 to anyone!
Alan Cuthbertson
Alan Cuthbertson
We have begun to use SM1 quite a lot recently, their positive attitude is refreshing, and the skills and quality of their work really stand out especially on those tight deadlines, I know that at PPMA we really appreciate their abilities and look forward to keeping them busy.
Trevor Bartlett
Trevor Bartlett
Great quality printing and service with a smile. The SM1 staff responded to my request for memorial cards in less than 24 hours. Recommended. Trevor Bartlett.
RedCoin IP
RedCoin IP
We've been using SM1 Print for a while now, and they have always provided a superb service. We've used both their graphic design services and printing, and been really impressed with both. They are also competitive on pricing and fast on service with high quality output. We highly recommend them!
Jan Kidacki
Jan Kidacki
A great and friendly service to the local community for social and business needs.
Jenny Be
Jenny Be
Highly recommended and I'm so pleased we used SM1 prints for my daughters 1st birthday party decorations. Although it was a small job, Jay, the manager was so professional, friendly and produced beautiful quality prints for us within a very short time. Hassle and stress free from the initial phone call right to collecting the finished items. Great customer service and will definitely use again. Thanks so much!
Katie Hobson
Katie Hobson
The team at SM1 Print are fantastic. Always on hand to support with any queries, including bespoke items. For a recent event, we needed many elements including banners, cards, and a pledge pin board. The team delivered on time, in budget and the content was of excellent quality. Thanks as always!