American Crafts-Shimelle Starshine Acrylic Stamps. A fun and easy addition to all your paper crafts and more! Simply peal from the backing sheet, place on a clear block, stamp and decorate away! This package contains eleven acrylic stamps on one 4x4 inch backing sheet. WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Do not mouth or chew. Imported.