POSTHORN B4 (250 Pack) Peel and Seal Mailing Envelopes Without Window White Mailing Envelopes with Grey Interior for Privacy Protection 353x250mm 120gsm : Amazon.co.uk: Stationery & Office Supplies
Q-Connect B4 Envelope 353x250mm Pocket Self Seal 90gsm Manilla (Pack of 250) KF02893 : Amazon.co.uk: Stationery & Office Supplies