C5 white Envelope (Pack of 500). Approx Size: 230x160mm. Keep your mailings professional and stylish with this pack of 500 C5 White Envelopes. Perfectly sized for A5 documents or folded A4 sheets, these high-quality envelopes are ideal for business correspondence, invitations, greeting cards, and everyday use. Made from durable white paper with a smooth finish, they offer a clean, crisp look for any occasion.