Canson XL Series Recycled Paper Sketch Pad, Fold Over, 50 Pound, 18 x 24 Inch, 50 Sheets Great for use with pencil and suitable for charcoal and pastel Clean erasing, micro-perforated, and highly opaque in 18 x 24 inch size 50 sheets of 50 pound/74 grams acid free paper Superior construction and heavier weight cover materials than other value priced pads Excellent quality papers in generous pads offer exceptional value