"The most popular sketch pad from Strathmore is the 400 Series recycled sketch paper pad. Each heavyweight sheet features a fine tooth surface that is ideal for experimentation or perfecting techniques with any dry media, including pencil, charcoal, sketching stick and pastel. Each wire-bound pad contains 30% post-consumer fiber and sheets are micro-perforated for easy removal. Details: Available in multiple sizes, 100 sheets, 60lb/89gsm, Acid free , 30% post-consumer fiber , Size: 5.5"" x 8.5""."