These high-quality, natural willow, compressed charcoal blocks are great for detail or broad coverage while drawing or sketching. Blendable; they adhere well to drawing surfaces and can be used whole or broken into smaller pieces for shading. Each stick is 5/16" square x 3" long. Non-toxic. Three assorted pieces in a peggable plastic clamshell package. Contains one each: soft, medium, and hard.