Grumbacher uses high quality vine to create a charcoal that is rich, blendable and lays down smoothly. Grumbacher Square Vine Charcoal is a medium degree square stick with a dark gray color that measures approximately .25 W x 5.75 L (.635 cm x 14.6 cm). Because it is a natural product, sizes may vary slightly. Sold in pack of 2. Made in USA. Since 1905, Grumbacher has been a brand trusted by students, professors, art conservationists, and professional artists throughout the United States.