Derwent Black Books are spiral bound sketchbooks with 40 sheets of 110 lb. black paper. They are perfect for drawing with oil pastels and colored pencils including Derwent Coloursoft or Inktense pencils. Black paper makes the colors appear more vibrant and bright. The heavyweight paper is also good for water-soluble pencils and light washes. These acid-free books are also great to use as photo display books or scrapbooks, etc... Size: A4 (approx. 8.27"x11.69").