The Mnemosyne N180A spiral notebook, made by Maruman Co. in Japan, is an excellent surface for ink drawings, calligraphy, writing, precise drawing, and drafting. The gridlines make it a good practice pad for calligraphers, since they help keep your line heights consistent. The smooth, almost slick texture is similar to Rhodia paper. Each pad is double spiral bound and has a stiff, chipboard backing that gives you a flat surface wherever you are. 70 sheets in A4 size (8.3" x 11.7").