Creative Mark kneaded erasers are one of those essential artist's tools. They are a non-abrasive eraser that works great for removing and blending pencil, pastel, and charcoal. They work quickly and cleanly. Erasers can be shaped to any form you desire for the most effective use. They do not leave crumbs. Each eraser measures approximately 1-5/8 inches by 1-1/4 inches and are 1/4 inch thick.