PENNY BLACK-Slapstick Cling Rubber Stamps. Penny Black stamps feature high-quality images in red rubber with a 1/8 inch foam pad for maximum transfer. Stamps are available in a wide variety of themes and designs for every day and every occasion! This package contains one 3-1/2x4-1/2 inch backing sheet with two Cling Rubber Stamps: Dropping You A Line. Made in USA.