Looking to save on your packaging costs? Our large letter boxes or Pricing in Proportion (PiP) boxes are designed to help you take advantage of the Royal Mail’s large letter pricing structure as they are able to fit through the 25mm large letter postal slot.
Our large letter postal boxes are available in a range of popular and convenient sizes to help you send a wide range of items, anywhere in the UK. Choose from C4 for large A4 sized items or C5 PiP boxes for posting Blu-ray discs, games, books and more. We also stock mini Royal Mail PiP boxes for items such as jewellery, watches and other smaller items – just remember that in order to qualify for the large letter pricing your parcel needs to be under 750 grams in weight.
Whether you just need a couple of PiP boxes for the occasional delivery or need thousands for your ecommerce business, simply select the number of boxes you need to see pricing details. We offer bulk pricing discounts on our full range of large letter postal boxes below and order online now on Boxes2u!