This surface has been developed by booq product designers for those of us developing 3D products or packaging. The paper's lightly printed 5 mm grid makes drawing scaled or full-size views or elevations easy, and light blue perspective lines are the perfect aid for sketching your project in 3D. The three A5-sized pads have a strong cardboard back designed to fit into your Booqpad and come with 50 sheets that have been micro-perforated for a clean tear-off every time.