1) Normal seal shop: name seal: flat seal is generally 5mm* 15mm, square seal: 12mm* 12mm, 15mm* 15mm, and then the official seal. The official seal is uniform in size. Moreover, the current stamping materials are all long strips, and it is not bad to use as many saws as you want.

2) Seal cutting shop: Most of the seals used by painters or brush calligraphy are 30mm*30mm and 45mm*45mm, mostly square seals, and relatively few circular seals. Most of them are (10-15 mm) * (20-40 mm), and hard-pen calligraphy uses square seals.

3) Note: The above data refers to the printing surface size, not the overall size.