A7 Invitation Envelope - Astrobright - 24# Gamma Green (5 1/4 x 7 1/4) - Announcement Envelope Series (Box of 250) A Quantity of 250 - A7 Invitation Envelope - Gamma Green 24# Astrobright Gamma Green paper - Standard Gummed Flap. Perfect for Greeting Cards, Greeting cards, Weddings or any announcement. This envelope may be sourced from any one of a number of top brands. Ships via UPS Ground