Derwent XL Charcoal Set of 6 Blocks of chunky charcoal offer a wealth of creative possibilities Use them on their sides for broad sweeping graphite and on their edges for detail work Add water for greater versatility and further artistic potential including splashes and washes Blocks measure 20mm square x 60mm long or .78W x 2.36L Inches Set of 6 colors includes: Ochre, Sanguine, Mars Violet, Sepia, Black, and White