C5 Envelopes are half the size of C4 envelopes and are suitable for sending an A4 sheet of paper folded in half. C5 envelopes are often used for mail shots or business letters and are classed by the Royal Mail as a letter which attracts the lowest postage rates.
If you would like any help choosing your C5 envelopes or are interested in purchasing in bulk then please call the Office Allsorts team on 0115 9455833.
C5 envelopes are a popular size as they are small enough to meet The Royal Mail criteria for the lowest postage price band yet still hold a lot more than the traditional DL envelope (providing the thickness of the envelope and its contents is 5mm or less and the package weighs no more than 100 grams). C5 envelopes measure 229mm x 162mm and can hold A4 sheets of paper folded in half, or unfolded A5 sheets of paper.
C5 envelopes come plain (without window) or with windows allowing addresses to be seen. Sealing methods include the traditional gummed flaps (lick & stick), press and seal which seal the envelope when the flap is pressed closed or peel and seal where a strip is peeled away revealing an adhesive strip which seals the envelope when the flap is pressed closed.
C5 envelopes are available from 5 Star, Croxley Script, Plus Fabric and Basildon Bond and come in White, Manilla and Cream.