Scholar Artists' Sketch Book Professional features a weather friendly Polypropylene rigid plastic cover & a pure white deluxe cartridge paper that gives life to colours. It offers white cartridge paper of 130 GSM thick; micro-perforated; 50 Sheets; A4 (29.7 cm x 21 cm or 8.3 in x 11.7 in). It is 100% Acid free; Chlorine free and Eco-friendly paper withstand repeated erasures. Perfectly suited to all dry mediums. Ideal for Pencil, charcoal, graphite, pastels, ink, pens, and markers.