Royal Mail PIP Boxes

Our Royal Mail PIP boxes have been designed with the Royal Mail pricing structure in mind. All these boxes qualify as Large Letter and will not be charged for the more expensive small parcel rate for shipping.

These boxes are perfect for sending CD’s, Books, DVD’s, Gift, Electronics, Games etc.


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Royal Mail Large Letter PIP Boxes

Our large letter boxes, also known as Pricing in Proportion (PiP) boxes, are strategically designed to leverage Royal Mail’s large letter pricing structure. These boxes are meticulously crafted to fit through the Royal Mail’s 25mm large letter postal slot, ensuring cost-effective shipping solutions for your parcels.

Available in a variety of popular and practical sizes, our large letter postal boxes facilitate the shipping of diverse items across the UK. Choose from C4 boxes, ideal for large A4-sized items, or C5 PiP boxes, perfect for mailing Blu-ray DVDs, games, books, and gifts. Additionally, our inventory includes mini Royal Mail PiP boxes tailored for smaller items like jewellery and watches. Please note, to qualify for large letter pricing, your parcel must weigh under 750 grams.

Whether you require a few PiP boxes for occasional deliveries or thousands for your e-commerce venture, simply select the desired quantity to view pricing details.

Sizes (Internal Dimensions):

  • MINI – 101mm x 101mm x 20mm
  • DL – 217mm x 108mm x 20mm
  • C6 – 112mm x 163mm x 20mm
  • C5 – 218mm x 159mm x 20mm
  • C4 – 320mm x 230mm x 19mm


  • Brown or White


  • Manufactured in a single wall (E-Flute) brown/white cardboard
  • Delivered flat pack
  • Easy to assemble
  • Secure, strong and durable

Delivery and Returns Information

Goods sold on this website are supplied in good faith. If however you order the wrong item, are not completely satisfied with the items you receive or simply want to return your goods, you must arrange for them to be returned to us, and providing they are received by us in good condition, we will refund the cost of the goods in full less the carriage costs incurred by us.

If any goods are faulty or damaged when you receive them, we will arrange for them to be replaced or refunded but you must notify us within 14 days of receiving delivery otherwise no claim will be entertained. Delivery charges for damaged or faulty goods or errors made by us will be fully refunded and/or not charged. Your statutory rights remain unaffected.

Your rights to return goods are protected under the EU Distance Selling Directive which can be found at


“I have ordered a fair few bags over the years and never been disappointed. Excellent customer service aswell. Thank you”


“Fantastic service. Ordered after midday and arrived the following day. Excellent service, even in these tricky times when everywhere else seems to have delays. Thank you!”


“Perfect product range for use by my small business. Quick to dispatch, always very helpful with any enquiries. Thank you!”

View our 5-star rating
Bulk order available
Contact us for more information
5 Star Review Rating
24hr response turn around
Call us on 01462 895600
Nationwide delivery
Free same day delivery options