yourATCstore Mermaid Beauties from the Sea Collage Sheet. This one was created for those artists who like mermaid altered art. There are a few that are larger than an ATC for use with other projects or they can be cut down to fit on ATCs. 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.