

If you are looking to send an item by Royal Mail 'letter' format we recommend C5 envelopes: C5 Envelope Size 162mm x 229mm We’ve answered your ‘most asked questions’ about envelopes and postage costs below too! Letter & Parcel Size Guide for Royal Mail PostageĮxample of Contents : Greeting card, lettersĮnvelope Suggestions : C6 Envelopes, DL Envelopes, C5 EnvelopesĮxample of Contents : A4 documents, magazinesĮnvelope Suggestions : Padded Bubble Envelopes, Book WrapsĮnvelope Suggestions : Book Wraps, Boxes Suggested Envelope Sizes for Royal Mail Postage Rates Our handy envelope postage guide below will help you work out the postage costs for different envelope sizes. It can be tricky to work out which envelope sizes are letters and which are parcel rates.


Confused about which envelope you need to stay within the Royal Mail postage restrictions? Perhaps you are planning a large scale mailing and want to keep postage costs down by staying under the letter / parcel limits, or working out a cost analysis for sending your products through the post.
