AMERICAN CRAFTS-Thickers Chipboard Number Stickers. Add dimension to your paper crafts with Thickers Chipboard Stickers. This package contains two 11x5-1/2 inch sheets of acid free; archival quality Chipboard Numbers. Available in a variety of colors and fonts: each sold separately. Imported. punctuation too! Sizes range from 3/4in to 1-1/4in and feature a leather like texture. Imported.