C4 envelopes (A4)
C4 envelopes are a universal size, designed to take an A4 sheet without folding. C4 envelopes are also referred to as A4 envelopes.
At Bureau Direct we offer an extensive range of portrait and landscape C4 envelopes, available in a choice of bright colours across the colour spectrum. If you’d like to add an extra touch to a plain envelope we also stock metallic foil envelopes.