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The C4 White Cardboard Envelopes range includes board backed and all board envelope options which are popular choices for sending A4 size documents in a smart and presentable way. The materials used are designed to be as strong and protective as possible while still keeping weight and postage costs down. These white cardboard envelopes feature a peel and seal adhesive strip which provides a secure closure and eliminates the need for extra tape. Our C4 white cardboard envelopes fit the Royal Mails guidelines for large letter size.
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