PiP * pip boxes * pip mail * postal cartons * pip royal mail * pip mailing * pricing in proportion boxes * pip boxes uk
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PiP - Boxes and Large Letter Packaging

pip boxes and pip mail suppliesYou can save on postage costs by following the Royal Mail’s Pricing in Proportion system (PiP) and using our PiP boxes, postal cartons and other packaging. The 3 classes of mail are Letter, Large Letter as well as Small and Medium Parcels. 

Our PiP Boxes

We have a range of PiP boxes, padded envelopes and postal cartons that are ideal to use as Pricing in Proportion packaging. They are all supplied flat-packed for convenient use and easy storage.

There are 6 sizes of our padded envelopes and 7 of our bubble lined envelopes that fit in the Large Letter category, as well as one white postal carton while the larger sizes go into the Small Parcel class. For other Small Parcel postal solutions we have white postal boxes (3 sizes), foam-lined postage boxes (3 sizes) and 9 sizes of our convenient standard single wall cardboard box.

Our PiP boxes and packaging for the Medium Parcel category includes our bubble-lined or padded envelopes, our book mailing boxes, our time-saving brown self-seal boxes (2 sizes) and of course a choice of differently sized single wall cardboard boxes.

Our wide range of cardboard boxes is perfect for posting bulkier items in the Medium Parcel category while conforming to the Royal Mail Pricing in proportion boxes specifications.

 Pricing in Proportion (PiP) Postal Guide

PiP Size Letter Large Letter Small Parcel (wide)
Small Parcel (deep) Medium Parcel
 Max Length  240mm  353mm  450mm  350mm  610mm
 Max Width  165mm  250mm  350mm  250mm  460mm
 Max Height  5mm  25mm  80mm  160mm  460mm
 Max Weight  100g  750g  2kg  2kg  20kg

Products from our Postal Packaging range

PiP Size Letter Large Letter Small Parcel Medium Parcel
 Single Wall Boxes  none  none  L2 
 many sizes
 White Postal Boxes  none  LGB1  LGB2   
Brown Self Seal Boxes  none  none   PP2  PP3
 Foam Lined Boxes  none  none  FOAM-SMALL
 CD Mailers  none  DISK-5   none  none 
 Book Mailers  none  none   TT-A4
Board Backed Envelopes  HBE-A5  HBE-A4  none   none 
Polystyrene Mug Packs  none  none  MUGPACK  none
Postal Tubes  none  none  CTLA (A3)
 CTLB (A2)
 CTLE (A2)
 CTLH (B2)
Coloured Bubble Bags  none  A5 - all colours
 A4 - all colours
 none  none
Bubble Lined Envelopes  none  Size/000
 Padded Envelopes  none  Size/00
 Size/5 Size/6


Tips for using the PiP system

For instance, you could save money on a direct mail marketing shot by posting it in a postal product conforming to the Large Letter requirement – one of our padded envelopes – rather than the Small Parcel. It is also cheaper to post an A4 document by folding it into an A5 rather than A4 size envelope (Letter as opposed to Large Letter).

Why Royal Mail have changed to PiP

Before the introduction of the PiP system, Royal Mail realised there were often discrepancies in the cost of mailing goods. It was thought that the amount of postage paid – based on weight – did not necessarily reflect the cost of handling and sorting items such as large letters and different sizes of postal carton. Postage was low on light, large items but high on heavy, smaller ones.

How does PiP work?

With size and

Telephone us on 01707 635353

Monday - Friday 9:00am to 5:00pm

Packaging2Buy Ltd, Frobisher Way, Hatfield Business Park, Hatfield, Hertfordshire AL10 9TY
Servicing the UK, Ireland and other offshore islands