LABLANCHE-Silicone Stamps. These high-quality silicone stamps will provide endless inspiration for anyone who uses them! Each stamp comes mounted on a durable 1/2 inch thick white foam block so you can stamp easily with minimal pressure. The silicone nature of the stamps is extremely heat resistant and makes for fantastically detailed designs. This 6-1/2x4-3/4 inch package contains Standing Clock: two stamps. Imported.