#10 Regular Envelope - Assorted Rainbow colors - 24# Astrobright papers (4 1/8 x 9 1/2) - Business Color Series (Assorted) (Pkg of 100) A Quantity of 100 - #10 Regular Envelope - Assortment of five astrobright rainbow colors. Astrobright ReEntry Red, Astrobright Lift Off lemon yellow, Astrobright Cosmic Orange, Astrobright Celestial Blue, Astrobright Gamma Green included. - Standard Gummed Flap. Great for mailing letters, invoices, statements, checks, bills, brochures, important documents, and more. This envelope may be sourced from any one of a number of top brands. Ships via Priority Mail