#10 Regular Envelope - Astrobright - 24# Cosmic Orange (4 1/8 x 9 1/2) - Business Color Series (Box of 500) A Quantity of 500 - #10 Regular Envelope - Cosmic Orange Made with 24# Astrobright Cosmic Orange Paper. FSC Certified. - Standard Gummed Flap. Great for mailing Invoices, statements, catalogs or announcements. This envelope may be sourced from any one of a number of top brands. Ships via UPS Ground