SL180 Mail Slot

180 x 180 x 36 mm

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.
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Product Description

Looking for mail slot size packaging?  This letterbox sized mailer is the ultimate packaging option.

The SL180 mail slot cardboard packaging is a fantastic option for fitting plenty of products through customers' mail slots, especially in those instances where having a mail box isn't an option.

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

We have made sure that every item in our Lil Mail Slot postal packaging range fits a range of mail slots measuring up to 10 x 1.5.  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 mail slot 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 mail slots 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 unrivaled 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