Art Advantage Willow Charcoal Assorted 12pc- Willow charcoal leaves dense, velvety black images. Suited for blending and smudging, it is also forgiving in that it is easy to correct and rub off with fingers or tissue. 12 sticks in a pack, 4 each of thin, medium, and thick sticks. Thick sticks measure approximately .25"x 5.25".