Alternatively, view our online demonstration  to help you work out which format your items fall into.

Greetings cards, personal letters, postcards and bills are just a few examples of items that are likely to fall into the Letter format.

Length: 240mm max

Width: 165mm max

Thickness: 5mm max

Weight: 100g max

A4 documents, CDs and DVDs in their cases, certificates, some large greeting cards with badges and most magazines will fall into the Large Letter format.

Length: 353mm max

Width: 250mm max

Thickness: 25mm max

Weight: 750g max

Useful tip
You might consider folding your A4 document in half to fit into a C5 envelope. This would bring it down to the Letter format, as long as it is still less than 5mm thick.

Gifts, clothes, shoes, posters, video tapes, large books and other large items and documents are all examples of items that are likely to fall into the Packet format.

Length: over 353mm OR

Width: over 250mm OR

Thickness: over 25mm OR

Weight: over 750g. There is no weight limit for items
sent First Class. The weight limit for Second Class
items is 1000g.

Sending larger items?

The maximum dimensions for rectangular items are 610mm x 460mm x 460mm.    Items over these dimensions should be sent by Standard Parcels.

Sending a poster?

The maximum length for rolled or cylindrical items is 900mm, and the length plus twice the item diameter must be no more than 1040mm.