





Large letter boxes
Ideal if your business sends many small products via post or courier, letterbox boxes fit through standard UK letterboxes. Their size allows for the delivery of your orders without customers needing to be at home to accept the delivery. They also meet Royal Mail’s PIP (pricing in proportion) guidelines.
You can specify your letterbox boxes in custom sizes tailored to your products. They can also feature printing on both inside and outside surfaces and integral or removal inserts to increase transit protection.
At GWP, our custom letterbox boxes are designed and manufactured at our UK site to your exact requirements. Our designers work closely with you to ensure the optimum cost, appearance, performance and sustainability are all achieved.
Benefits of custom letterbox boxes
By sourcing custom letterbox boxes from GWP, you can expect:

FAQs

What are letterbox boxes?
Letterbox boxes are packaging with a width and height that allow them to fit through standard UK letterboxes. The length of the pack can be adjusted to accommodate different-sized products. Letterbox packaging allows items to be delivered even if the recipient is not at home.
What products are letterbox boxes suited to?
Letterbox boxes are popular for a wide range of products. They are suitable for games, DVDs, books, brochures, chocolates, clothing, flowers, and any product with similar dimensions. They are also commonly used for subscription box packaging.
Do letterbox boxes adhere to Royal Mail pricing bands?
Letterbox boxes typically fall within the Royal Mail PIP (pricing in proportion) guidelines. These guidelines determine the prices for parcels that they deliver. Adhering to these can further reduce your expenditure through reduced delivery costs.
What are letterbox boxes manufactured from?
Letterbox boxes typically use single-wall cardboard, which allows for maximum space within the pack. However, the specific grade is chosen based on the product’s weight and fragility.
Can letterbox boxes include inserts?
Although letterbox boxes have limited internal space, you can include inserts. Die-cut cardboard fittings or foam packaging inserts (such as Stratocell) are the most common, helping to brace and cushion products from damage during shipping.
Disclaimer: Application images on this page may have been enhanced or created specifically to illustrate a products features and/or potential uses. Please see our content policy for further details.

Bespoke
Our designers create packaging tailored to your exact requirements for optimum performance and cost.

Cost-effective
We also have a range of proven strategies to drive down costs across your business’ operations.

Sustainable
We use recycled, recylable and FSC-certified material alongside sustainable and commercially effective designs.