Set of 10, each coin is about 1 inch in diameter.
These Chinese old coins are from the Chin Dynasty (1644 - 1911). One side has the name of one of the Emperors, with the period of his reign on the other side.
These round coin with square hole were first issued in the Qin Dynasty (221-209 BC). The round circle symbolizes Heaven while the square represents the Earth. When used by humans, they represent the cosmic trinity of luck of HEAVEN-EARTH-MAN.
In Feng Shui coins represent the element metal and symbolize wealth.