FeaturesPlain white envelopes with address windowCrisp 90gsm white paperSelf-adhesive flapSuitable for A5 or folded A4 documentsC5. Pack of 500.Made of crisp, quality 90gsm paper, these Office Outlet Window 90gsm Self Seal Boxed C5 Envelope (Pack of 500) feature a self-seal closure for security in transit and a convenient address window measuring 90 x 45mm. These C5 envelopes are suitable for an unfolded A5 sheet, or an A4 sheet folded once. This pack contains 500 white envelopes.