No. 5. According to information about calligraphers, most calligraphers use size 5 brushes, and size 3 brushes are used by beginners. Calligrapher (foreign name: Calligrapher) refers to a person who is good at calligraphy and can push it to the height of art. They reproduce reality and express emotional ideals through aesthetic creation activities, and realize the mutual objectification of aesthetic subjects and objects in their imagination.