NITRAM Charcoal Assortment contains 2 Sticks each of H (Hard), HB (Medium), B (Soft) & B+ (Extra Soft) Charcoals. Each Academie Fusain is a square of approximately 5 mm x 5 mm x 15.2 cm (1/4” square x 6” Long) dimensions. The Extra Soft Charcoal Sticks are round of approximately 6 mm Diameter x 15 cm (.236” Dia x 6” Long).