This watercolor paper set includes two books, each containing 20 sheets of 7.5 x 5.1-inch 140 lb cold press watercolor paper, ideal for detailed painting and watercolor techniques. The 1150 GSM black hard cover offers additional protection and gives the books a professional and elegant appearance. The spiral binding design makes page turning and hand-held painting more convenient, and the white pages provide artists with an ideal canvas for their creations.