Our flat card in cover weight fits in our #10 open end envelopes, this slender design is perfect for a quick note or a unique invitation. Environmentally friendly, Eco-White is a cool white with an eggshell finish. Made just for us, this 100% recycled, 30% post-consumer waste paper is archival, acid-free, and prints great in laser and ink-jet printers. Size - 3 7/8" X 9 1/4" Sold in packs of 25