Derwent XL Charcoal is a range of naturally water-soluble toned charcoal blocks in six traditional colors. These extra-large blocks of charcoal are perfect for broad, expressive strokes. Draw with the sides, edges and corners to create different gestural marks. Layer the rich tones on top of each other, create lines and texture with an embossing tool and move color around with your finger. Each XL Charcoal block measures 20mm x 20mm x 60mm (0.787" x 0.787" x 2.36").