The Maruman S131 Sketch Book has quality paper made in Japan. It contains 24 sheets of A4 sized textured paper (287 mm x 202 mm / 11.3 inch 7.95 inch), 126.5g/m2. The paper is neutral PH and acid free, which is excellent for ink, marker, colored pencil, pen, crayon, pastel, charcoal and so on. It is well absorbent and only has minimal ghosting / bleed-through. The spiral bound system with looped double wire is very durable.