Derwent Pastel Blocks, Grey, Pack, 6 Count (36001) Blocks have a creamy consistency and smudge easily with uniform softness Firm consistent texture produces minimal dusting Square shape is ideal for both fine and detail and broad, expressive strokes So versatile they can be used wet or dry, or mixed with other media 2.95L x .31W Inches or 75mm long x 8mm wide