yourATCstore Let's Play Collage Sheet. What a fun and colorful collage sheet with adorable children playing all sort of things, tea party, dolls, playing with balls and more. The images are perfect size for ATCs, as well as greeting cards and other collage project. 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.