yourATCstore Photographs and Memories #2 Collage Sheet. Most of these were photos I had purchased and have wonderful sepia color. Some are antique photos of my own grandparents. These antique images are perfectly sizes for ATCs, greeting cards and other artwork too. This matte finish collage sheet is professionally printed and comes in a crystal clear bag for protection. Each collage sheet measures 8 1/2" X 11" and is acid free.