SL180 Letterbox

180 x 180 x 36 mm
In Stock

Are you looking for letterbox size packaging? Our letterbox range of postal boxes are designed to get the maximum amount of product through a standard UK letterbox - designed to help you get confirmed deliveries every time without the need for recipients to be present! Complete with our patented pop-up assembly, these letterbox mailers are super easy to put together - just checkout the guide on the link below to learn how easy these things are to put together!

For assembly instructions - please click here.
Each (ex VAT)
£0.25 Each (ex VAT)

Unless ordering samples (maximum of 3 per order). Please select "Pack", "Part-Pallet" or "Pallet" below before selecting how many to add to basket.

Select "Pallet" and save up to 46% on certain lines. Click here to see how.

(Total items)
Fast & Free Delivery

spend £75 (ex VAT)

Same Day Dispatch

Order by 2pm

Cheap Samples

Buy at Pallet Price

Product Description

Looking for letterbox size packaging?  This letterbox sized mailer is the ultimate letterbox-fitting packaging option.

The SL180 letterbox cardboard packaging is a fantastic option for fitting plenty of products through customers' letterboxes - around 90% of letterboxes in the UK to be exact.

This means that you can benefit from far fewer failed deliveries and instead benefit from plenty of happy customers!

Our research tells us that almost 95% of UK letterboxes are at least 254mm (10 inches) wide and 38mm (1.5 inches) high.

We have made sure that every item in our Lil Letterbox postal packaging range fits this 254 x 38mm range.  Perfect for health and beauty, skin care, photography, diaries, artwork, crafts, sanitary items or other A5 sized contents.

Featuring our market-leading hot melt peel n seal / red-tear-strip combination, using strong cardboard material with 100% green recyclable credentials.

The strong design of this letterbox cardboard packaging is doormat friendly.

Hinged lid for extra wow factor, with secure seal, it's hot melt adhesive gives the best tight seal‚ (at least twice the strength of standard double-sided tape).

Environmentally friendly, 100% recyclable and FSC certified.  Problems with storage?  At Lil packaging, we hold vast quantities of Lil letterboxes in stock for your convenience.


Your packaging is the first time that your customers physically experience your product.  Getting it right is your chance to make the best first impression; we help you do just that.

With a clear understanding of what you need, we use our knowledge and expertise to guide you towards the most appropriate solutions.  It's about unrivalled service.

Technical Specifications

  • Colour: White
  • Height: 36 mm
  • Height inches: 1.4 inches
  • Length: 180 mm
  • Length inches: 7.1 inches
  • Material type: 125k e flute corrugated
  • Weight: 63g
  • Width: 180 mm
  • Width inches: 7.1 inches