This portrait GraF 360 Sketchbook by Clairefontaine measures 4.25 by 6 inches (A6) and features book block binding that ensures the book will lay completely flat. Ultra smooth blank 100g paper, resists feathering and bleed-thru making it ideal for pens, pencils and markers. Each book includes 100 sheets and can be used for drawing, sketching, writing and more.