American Crafts-DIY Shop 3 Thickers Alphabet Stickers: Regards/Gray Chipboard. These delightful stickers are the perfect finishing touch for any project! This package contains ninety-nine letter and number chipboard stickers on two 11x5-1/2 inch sheets. Acid free. Archival quality. 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.