The D&S Sketchbook has a solid thread stitching and natural white paper with nice tooth. Ideal for pencil and illustration pens, it also has a handy red ribbon to mark your place. The acid-free paper is 65lb.
Mini 3.5" x 5.5" book has 30 sheets (and no ribbon bookmark)
4" x 6" and 6" x 4" books contain 62 sheets.