Mead Window Envelopes, Business Envelopes, Self Seal #10, Single Left Window, Peel and Seal Envelopes with Window, Security Tinted White Envelopes, 500 per Pack (742022) : Amazon.co.uk: Stationery & Office Supplies
Mead Plain White Self-Seal Business Envelopes - Business - #10 - 4 1/8" Width x 9 1/2" Length - Self-sealing - 50 / Box - White