How big is the drum stone of the villa?

The radius of the villa drum stone is 30 cm. No matter how big it is, it doesn't look good. A radius of 30 cm is appropriate. Baogu Stone is a symbol of traditional houses in China. It is located at the entrance of the house door at the bottom of the traditional quadrangle gate. Shaped like a round drum, it belongs to a kind of door pillow stone. It is shaped like a drum supported on a stone base, hence its name. Drum-hugging stone, also called stone mirror, is a kind of door pillow stone. It has the function of fixing the gatehouse in the quadrangle building. Because it is located on both sides of the entrance of the house gate, it is also called "door stone", which is divided into two types: round and square.