C6 envelopes are a versatile and popular choice for a wide range of uses, including greeting cards, invitations, and personal letters. Measuring 114mm x 162mm, they are designed to fit A6 cards perfectly, which are made by folding an A4 sheet in half twice. Compact and cost-effective for Royal Mail postage, C6 envelopes are available in an extensive array of colours, textures, and weights to suit seasonal trends and personal preferences. From vibrant summer shades to classic black for formal events, the options are plentiful. For the environmentally conscious, we also offer recycled C6 envelopes, providing a sustainable choice with a charming rustic finish. Ideal for creative projects or special occasions, C6 envelopes remain a practical and timeless mailing solution.