Studio Pets By Myrna A4 Notebook This Studio Pets By Myrna A4 Notebook is ideal as a sketchbook, recipe book, or planning pad. Write your to-do things in this squared notebook which features binding with metal spiral polypropylene cover 360° opening and rounded corners. 80 micro-perforated squared sheets. It has a polypropylene cover. Spiral binding and interior of 160 squared pages of 90 gr (5x5mm). It is microperforated and has 4 holes.