How big is the seal of sadness?

The size of the sad seal is 3.5cm× 3.5cm× 7.5cm ... According to relevant public information, the Beihong seal was carved by a famous Chinese painter, calligrapher and seal engraver, Mr. Pan Tianshou, with the size of 3.5cm× 3.5cm× 7.5cm. This seal is one of Pan Tianshou's representative works, and it is cherished for its unique artistic style and historical value. The seal of Beihong is beautifully carved, and the name of Beihong and the name of the seal are engraved on the surface. The whole seal is simple and generous in shape and profound in meaning. It is one of the important cultural relics in the history of modern art in China.