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Phone GWP Packaging - 01793 754 444
01793 754 444
Mon - Fri / 08.00 - 17.00
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Free advice and quotes
GWP Packaging

Corrugated cardboard packaging expertise and innovation

GWP Protective

Widest range of protective cases with custom foam in the UK


UK leading independent Correx® packaging manufacturer

GWP Conductive

Providing cutting edge ESD safe packaging for 30+ years

GWP Coatings

Supplying sheet plants with coated corrugated material

Reduce packaging costs

A range of strategies and ideas to reduce your ongoing packaging costs

Protective packaging

Protection for your products and equipment to prevent costly damage in transit

Improve packaging efficiency

Streamline your operations, enhancing efficiency and productivity

Environmentally friendly packaging

Minimise the environmental impact of your packaging and business

Packaging design service

Custom packaging to your exact requirements, designed by an award winning team

Packaging guides and blog

A range of guides, tips and detailed articles to improve your packaging

Case studies

Examples of successful packaging, and how your business can benefit

Packaging markets

Specific industry knowledge and expertise relevant to your business

Quality standards

Accreditations / standards to ensure you get the highest packaging quality

Packaging news at GWP

The latest news, events and community projects happening at GWP Group

Royal Mail Box Sizes

Custom design

Tailored to your requirements

UK trade supplier

Huge product selection

Reduce costs

Range of strategies and services

Selecting Your PIP Packaging

Compare all Royal Mail PIP Boxes at a glance

Whilst the range of Royal Mail PIP boxes (pricing in proportion) is not huge, it can still be difficult to select the correct option for your business (or even if you should be using them at all).

To help with your decision making process, the below table has been created. It allows a quick, at a glance view of all the requirements, limitations and details for each options available.

Plus, if you think you have found the right postal packaging for your business, you can click through for further information and buying advice.

Size Table

View all Royal Mail size / weight / etc. guidelines

PIP Size Max Length Max Width Max Depth Max Weight Delivery
Letter 240 mm 165 mm 5mm 0.1 Kg NA
Large Letter 353 mm 250 mm 25 mm 0.75 Kg 0.10 Kg = £1.06
0.25 Kg = £1.50
0.75 Kg = £2.72
Small Parcel 450 mm 350 mm 160 mm 2 Kg 01 Kg = £3.55
02 Kg = £5.50
Medium Parcel 610 mm 460 mm 460 mm 20 Kg 01 Kg = £5.80
05 Kg = £15.85
10 Kg = £21.90
20 Kg = £33.40
Large Parcel > 610 mm OR > 460 mm OR > 460 mm 30 Kg
PIP Size Max Length Max Width Max Depth Max Weight Delivery


Tips on using the table

GWP understands that it can still be difficult to find exactly what you need, even with having all of the information in one place. As such, the diagram to the right / below this text (depending on what device you are reading this on) also highlights how the measurements of each box are calculated.

If you still cannot find precisely what you need using the table however, a member of the GWP team will be happy to offer expert advice. You can reach us on 01793 754 444 or by emailing

PIP Box (Royal Mail) size guide

Alternative Packaging Options

Other corrugated boxes and packaging available

Postal packaging boxes and mailers

Postal Packaging

Huge range of cardboard mailers and postal boxes

Cardboard bottle boxes with dividers

Bottle Packaging

Specialist packaging for shipping bottles safely

Ecommerce packaging boxes

Ecommerce Boxes

Plain or printed boxes to delight your customers

Korrvu Lok packaging


Innovative system for improved transit protection

Industrial transit packaging

Industrial & Transit

Durable, cost effective packaging for bulk shipping

Cardboard box dividers inside outer corrugated packaging

Inserts / Dividers

Improve protection, space and packing efficiency

Retail packaging and POS

Retail & POS

POS and packaging perfectly matched to your brand identity

Get In Touch

Genuinely cost effective and impartial

Looking for additional info, advice or even quotes on your corrugated packaging supply? GWP will be happy to help!

As a UK leading, independent manufacturer of corrugated packaging products, you can get truly unbiased advice on the best packaging option for your business. And with a focus on innovation, you can source boxes and designs that are not only unavailable anywhere else, but are beyond what you probably believe is possible.

Every quote provided is free, no obligation and with absolutely no pressure. Add the free expert advice and customer service of the highest level, and it allows you to source the right packaging – at the right cost – for your business.

Buying Info

FSC Packaging


Transit / Shipping

Retail & POS

GWP Packaging guide download to spot signs of overpaying for packaging

Free PDF Download

Get your free guide to discover the 7 tell-tale signs you are paying too much for your packaging

Related Guides / Articles

Video Consultation

Have a packaging project but not able to meet face to face? Request a free video consultation today!

Quotes & Advice...

Found your perfect packaging?
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    Here to Help

    Contact a member of our sales & support team directly

    John Elliott GWP Packaging

    John Elliott

    Product Adviser
    01793 754 444

    Bill Chapman, GWP Packaging product adviser

    Bill Chapman

    01793 754 444

    Ian Heskins

    Ian Heskins

    New Business Director
    01793 754 444

    Phone GWP Packaging

    01793 754 444

    Mon – Fri 08.00 – 17.00

    Email GWP Packaging

    Email a packaging expert

    Still looking for the perfect PIP or postal packaging for your business? A member of the GWP team is here to help...