PIP Boxes

Pricing in Proportion (or PIP) boxes are among the best to use if your business is looking to lower postage costs. Ideal for small items, these parcel boxes come in four different sizes, three of which fit through the 25mm Large Letter Size slot, meaning Royal Mail will class them as a large letter and charge accordingly.

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Buy PIP Boxes

  • Four pip box sizes available
  • Minimise postal costs with pip postal boxes
  • Made from lightweight board
  • Made from 59.9% recycled material

Three Large Letter sizes and the fourth size will fit as a small parcel. You won’t pay more than you need to on weight either, as these postage saver boxes are made from light board. To put them together, simply fold along the pre-defined creases and lock them into place using the tabs, securing them with tape.  Watch our video to see just how easy it is.

Watch our video about "PIP Boxes" - use the full screen option to see in the best quality.

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PIP Boxes Video Transcript

PIP Boxes are specifically designed to fit through the 25mm slot that Royal Mail class as a large letter. This minimises your postal costs and the boxes are quick to put together as well as being lightweight and durable. Simply fold along the pre-defined creases, lock them into place using the tabs, and then secure them with tape like this.


The boxes are sent to you flat packed for easy storage and delivery. They come in three sizes, all of which are guaranteed to fit through the large letter slot. The total package must weigh less than 750g.


Order online or by telephone before 3pm and we aim to despatch your order the same working day. Orders over the value of £35 are delivered free of charge. For any other queries please call our customers service helpline on 02380 869999 or visit our website and our friendly staff will be more than happy to help you.