Postal guide

Do you need advice on postal sizing? Then our handy postal guide can help you.

Find out about the Royal Mail PIP sizes, and which of our postal products are suitable in line with the PIP sizes!

If you have any questions regarding postal sizes, or on any of our postal packaging products, please call us on 0800 288 8822.

But what is a ‘PIP’?

PIP stands for Pricing in Proportion, and is related to the weight, length, width and thickness of a package.

Take a look at the table below to see where your product would fit in this sizing system, and what packaging would be best suited to use for it.

Postal Guide

Format

Examples & Sizes

Try our mailers and postal boxes

Letter

Letter

Max weight: 100g
Max length: 240mm
Max width: 165mm
Max thickness: 5mm

Large Letter

Large letter

Max weight: 750g
Max length: 353mm
Max width: 250mm
Max thickness: 25mm

Small parcel wide option

Small parcel

Wide option

Max weight: 2kg
Max length: 45cm
Max width: 35cm
Max thickness: 8cm

Small Parcel Deep option

Small parcel

Deep option

Max weight: 2kg
Max length: 35cm
Max width: 25cm
Max thickness: 16cm

Medium parcel

Medium parcel

Max weight: 20kg
Max length: 61cm
Max width: 46cm
Max thickness: 46cm

Small roll

Small roll

Rolls and cylinders up to and including 450mm in length and 80 mm in diameter.
Does not exceed 2kg.

Medium roll

Medium roll

Rolls or cylinders where the length plus twice the diameter is less than 1,040mm

with no dimension exceeding 900mm.

Does not exceed 20kg.