#10 Regular Envelope - Astrobright - 24# Terra Green (4 1/8 x 9 1/2) - Business Color Series (Pkg of 50) A Quantity of 50 - #10 Astrobright Terra Green Envelope Made with 24# Astrobright Terra Green Paper. FSC Certified. - Standard Gummed Flap. Great for mailing statements, invoices, checks, letters, brochures, newsletters, advertising materials, contracts, and more. This envelope may be sourced from any one of a number of top brands. Ships via First Class Mail