American Crafts-Heidi Swapp Hello Beautiful Wood Mounted Stamps: Calendar Numbers. A fun and easy way to add numbers and symbols to any paper crafting project! This package contains twelve 1/4x1/4 inch stamps mounted on twelve 1-1/4 inch tall wooden blocks. 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.