S = 24-pack, M = 36-pack. A5 leather journal notebook measures 5.6 x 8.1 inches/14.3 x 20.5 cm, convenient to carry and store. Package includes 24 notebooks in 12 cover colors, 2 each color. Each notebook has 64 sheets/128 pages. Pu leather cover is sturdy, not easy to deform or fade. Inner pages made of quality paper. Soft comfortable surface for pleasant touch. Suitable for school, office, home use. For taking notes, sketching, planning, drawing. Quality materials prevent ink leaking. Paper color protects eyesight. Weight: 9.57 pounds.