yourATCstore Delicious Hot Coffee Anyone? Collage Sheet. This coffee collage sheet has wonderful vintage coffee photos. This collage sheet has some duplicate images which is different from the other 2 coffee collages that we have. Perfect size images for ATCs, greeting cards and other artwork. These matte finish collage sheets are professionally printed and comes in a crystal clear bag for protection. Each collage sheet measures 8 1/2" X 11" and is acid free.