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 60lb/89gsm 1 padAcid free 30% post-consumer fiberSheet sizes:100 sheets 14" x 17" (35.6cm x 43.2cm) 50 sheets 3" x 9" (7.62cm x 22.86cm) 100 sheets 3.5" x 5" (8.9cm x 12.7cm) 100 sheets 5.5" x 8.5" (12cm x 21.6cm) 50 sheets 5.5" x 12"(13.97cm x 30.48cm) 100 sheets 9" x 12" (22.9cm x 30.5cm) 100 sheets 11" x 14" (27.9cm 35.6cm) 100 sheets 14" x 17" (35.56cm x 43.18cm) 30 sheets 18" x 24" (45.72cm x 60.96cm)