yourATCstore Sew Fun! Vintage Sewing Collage Sheet #1. This collage sheet features an assortment of vintage sewing postcard and vintage sewing pattern images that are perfect for ATCs, greeting cards, journal books, and more. 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.