UK Royal Mail Pricing / Size Guide Help

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.

UK Mail Formats
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.