yourATCstore Artist Trading Card Collage Sheet - Flower Beauties. This collage sheet features an assortment of images with beautiful colorful flowers to create loads of flower themed ATCs. These images can also be used for other art projects too. These matte finish collage sheets are professionally printed and comes in a crystal clear bag for protection. Each collage sheet measures 8 1/2 in. X 11 in. and is acid free.