I made a leather notebook for my daily to-do list and mini sketchbook. It is one of the three notebooks that I carry around with me when I'm working. The Picasso notebook at the back is for projects, the navy blue one is for idea sketching and notepaper. I usually only carry the small one when I'm off. The measurement is based on my Traveler's notebook. I'm going to try to engrave on the leather cover later when I get the tools needed.