This sketch paper has been toned specifically for use with light and dark media. The pads contain 80 lb. (118gsm) medium-surface sketch paper appropriate for graphite, chalk, charcoal, sketching stick, marker, china marker, colored pencil, pen and white gel pen. The paper is 100% recycled and acid-free with kraft and bark fiber inclusions for visual interest. Each 5.5" x 8.5" and 9" x 12" pad contains 50 sheets, and each 11" x 14" and 18" x 24" pad contains 24 sheets.