The Hero Arts Clear Stamps Texture Blocks set provides exceptional quality in the market. These stamps, sized at 4 x 6 inches, are crafted in the USA from authentic photopolymer material, ensuring non-toxicity, biodegradability, and flawless ink transfer for a true impression with every use. Simply peel the stamp from its backing and adhere it to an acrylic block for effortless positioning. Mix and match the designs to suit your creativity. Cleaning up is a breeze with water or stamp cleaner.