Cambridge Imprint Slim Exercise Books are modelled on old-fashioned school exercise books. They have covers of heavy, 170 gsm patterned paper, without any text or logo, and inside there are forty pages of lined 90gsm ivory paper. Each book measures 170 x 213 mm. They are a perfect size for a small project: for writing a story or keeping a diary. The slimness of the book makes finishing it completely an achievable goal.