Classic black, hard-cover sketch books are an artist essential. These books feature acid-free, bright white, 75lb. (110 gsm) paper, sourced from certified sustainable forests, ideal for sketching, drawing, and writing in any dry media. Each hard-bound book contains 110 sheets (220 pages) and has a traditional binding, allowing the book to lie flat and for drawings to flow across both pages of the sketch book. The double wire spiral-bound books have 80 sheets (160 pages) that are micro-perforated for easy removal.