Seth Cole 18" x 24" Big Book sketchbook. sketching pad features premium-quality, 60 lb., 89 gram sketch paper. Heavy-weight, acid-free paper with light texture is the artist's best choice for charcoal, pastel, pencil, or pens. Identical to Strathmore's #400 series sketch paper. Heavy-duty TOP spiral-bound sketch book with durable heavyweight chipboard back cover. 33-sheet sketch pad. Seth Cole sketch books are made in the USA.