✓ Royal Mail Authorised Inspector since 2008 | Trading since 2005
UK Royal Mail Pricing / Size Guide Help
Mailcoms Support · UK Royal Mail Pricing
A guide to UK Royal Mail mail formats, sizes and weight limits to help you pay the correct postage and avoid surcharges.
Work Out Which Format Your Mail Piece Falls Under
Below you will be able to find a helpful table which can be used as a guide when sending your mail. Work our what format your item falls under.
| Format | Examples | Max. Weight | Max. Length | Max. Width | Max. Thickness |
|---|---|---|---|---|---|
| Letter | Greeting Cards, Bills, Invoices & Personal Letters | 100g | 24cm | 16.5cm | 0.5cm |
| Large Letter | A4 Documents, Certificates, DVD case & cards with badges | 750g | 35.3cm | 25cm | 2.5cm |
| Small Parcel | Boots, Portable devices & desk lamp | 2 Kg | 45cm | 35cm | 16cm |
| Medium Parcel | Greeting Cards, Bills, Invoices & Personal Letters | 20 Kg | 61cm | 46cm | 46cm |
Mailcoms size guide ruler
You can use our very own Royal Mail size guide ruler to ensure you always pay the correct postage and help avoid Royal Mail surcharges. Simply get your mail item and see what size slot it fits into, then weigh your item to calculate postage. For all of our new customers, along with your first order you will receive a free size guide ruler, our handy informative mouse mat and other useful information, guides and tips.
Prices
To view the latest Royal Mail price list and see how much your mail will cost to send, download our Royal Mail PDF wall poster.
Tubes
For any tube-shaped items, the length of the item plus twice the diameter must not exceed 104cm. The greatest dimension should be no more than 90cm.
Large Parcels
Parcels that are larger than 61cm x 46cm x 46cm or heavier than 20kg can be sent using Parcelforce services which include tracking and are guaranteed. If you wish to send items that have dimensions larger than those listed above, then you’ll need to send those items via Parcelforce Worldwide where items can measure up to:
› 1.5m in length and 3m length and depth combined.
› Weight limit: 30kg
› Large parcels can only be sent via Parcelforce.
Weight limits on Special Delivery:
The maximum weight limit for Special Delivery Guaranteed by 1pm™ items is 20 Kg.
The maximum weight limit for Special Delivery Guaranteed by 9am items is 2 Kg.
UK Royal Mail Pricing & Size Guide – Frequently Asked Questions
What are the Royal Mail mail format sizes?
Letter up to 100g (24 x 16.5 x 0.5cm), Large Letter up to 750g (35.3 x 25 x 2.5cm), Small Parcel up to 2kg and Medium Parcel up to 20kg; larger items go via Parcelforce.
How do I avoid Royal Mail surcharges?
Use a size guide ruler to check which format slot your item fits, then weigh it so you always pay the correct postage.
How heavy can a Special Delivery item be?
Special Delivery Guaranteed by 1pm is up to 20kg, while Guaranteed by 9am is up to 2kg.
Need help working out your postage?
Our technical team are Royal Mail Authorised Inspectors and fully qualified franking machine engineers. Call us on 01543 572 776 – Mon–Fri 8:30 to 17:00.