American Crafts-Wonder Thickers Alpha Stickers: Charm/Corrugated Kraft Chipboard. Add dimension and a pop of color to your next project with these chipboard stickers. This package contains 135 letter, number, and punctuation mark stickers on two 11x5-1/2 inch sheets. 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. Acid free. Imported.