This is a great set of 40 coloring pages called Ladies of Nature Coloring Book. It contains two full sets of 20 grayscale illustrations by Alena Lazareva. All pages are 8.5 x 11 inches, printed on one side only and non-perforated. Recommended with colored pencils, crayon, and soft pastel. If using a marker make sure to use a sheet of cardstock or chipboard backing. Not suitable for watercolor.