Strathmore Gray Scale Paper Pad 400 9X12 by Strathmore Sale $8.35 | / 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Each of these tape-bound pads feature 80 lb. sheets in white, black and three tints of gray. They are ideal for tonal studies. Textured for use with charcoal, pastel, chalk and crayon. Each pad contains 15 sheets.