Amazon.com : Blake Purely Environmental C5 162 x 229 mm 90 GSM Nature First Recycled Wallet Self Seal Window Envelopes (RN028) White - Pack of 500 : Office Products
C5 Size 162 X 229 mm 80g White Paper Right Window Business Envelopes with Post Self-Adhesive - China Color Printed Paper Envelope, Envelope | Made-in-China.com