Hero Arts - Background Cling Stamp - United People Bold Prints. A beautiful and artistic take on a crowd of diverse faces. This product coordinates well with our Unity Collection. Check it out for lots of creative options. Measuring 6x6 inch, Bold Prints background cling stamps are large enough to fully cover an A2 card and can be rotated for use in any direction. All Hero Arts Cling stamps are made with deeply etched red rubber for precise stamping. They cling to an acrylic block, and clean up easily with water or stamp cleaner. Artist tip: Use without a block! Place rubber face up, apply ink to the design, and then press the paper to the inked rubber. Made in the USA.