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C4 Board Backed Envelopes are perfect for sending important A4 sized documents which need to be kept flat during transit. Our A4 do not bend envelopes have both a rigid backing board and a paper front to make your mail lightweight, keep postage costs to a minimum, and provide excellent protection to your flat items. A peel and seal adhesive strip closure ensures fast and easy packing for you, and provides a secure seal which eliminates the need for any extra adhesives. A4 board backed envelopes are perfect for a large range of needs; available in smart black, plain and printed white with or without a window, or manilla with printed do not bend - all are packed in boxes for neat organisation.
Please note: C4 size is up to 229 x 324mm, designed to fit A4 sized items of 210 x 297mm.