The GreengrocerÕs Brown Bag envelopes are inkjet friendly, made from 20% post-consumer waste and 100% fun for your next project. Just think of the brown grocery bag that you might get at your local super market, that is the look and the feel you will get with this fun paper! A1 square flap envelopes are the perfect size to put a 3 1/2 x 5 invitation, card or stationery into.