Simplelifeco UK 20 x FSC Certified Board Backed Envelopes (A4/C4) | Eco Friendly Please Do Not Bend Envelopes for Certificates, Documents & Art Prints : Amazon.co.uk: Stationery & Office Supplies
265x180 mm White Corrugated Eco Friendly Envelopes Mailer - D/1 equivalent - Pack of 10