SPEEDBALL ART PRODUCTS-Young Artists Bienfang: Sketch & Draw Artist Trading Cards. Artist Trading Cards are self-produced original miniature works of art that anyone can do. Trade; share; collect; and create! This package contains twenty 3-1/2x2-1/2 inch sheets of 70lb sketching and drawing paper. Each sheet has a medium surface texture that is excellent with charcoal; pastel and pencil. Acid free. Made in USA.