How big is the notebook for writing brush?

Generally speaking, you don't need a book to write when you start practicing Chinese calligraphy. You always buy a blank sheet of paper with MIG or go back to the palace to practice. The paper is not very thick, but it is generally much thinner after printing. But only after practicing white paper can you write rice paper. Generally, buying white paper depends on the size of the grid. The grid for beginners is generally 8- 12cm. I hope it helps you.