The goshuin-cho (stamp book) is 12.2cm wide x 18cm long and 1.7cm thick. I made a camellia with five red mizuhiki cords. The camellia is about 3.5cm in size, and the rubber band is 1cm wide. This is the same as M-8. In addition to the goshuin-cho, it can be used for lunch boxes, small boxes, etc. Please see the profile.