Pentalic - Utility Sketchbook - 11x8.5 - Pentalic Utility Sketchbooks have a soft cover. Pentalic Utility Sketchbooks are perfect bound BIG utility sketch books that have 288 pages of acid free 60 lb. (100 gsm) paper! This medium tooth sketch paper is excellent for all dry media. This pad is 11 x 8.5 inches and contains 288 pages of quality sketch paper.