Two pieces, about 18mm in diameter:
Five items, about 23mm in diameter:
10, with a diameter of about 28.2mm;
Twenty pieces, about 34 mm in diameter:
The thickness is generally between 1.2 and 1.8 mm, and the size and thickness of different versions are slightly different.
Extended data:
Qing copper coin, the scientific name is the Qing Dynasty mechanism copper circle. There are four Chinese characters of "Qing copper coin" in the center of the coin face, with small characters embedded to represent the place name, with the words "Qing copper coin" in Manchu on the top and years on both sides.
There are two Chinese characters "Hubu" in the middle of the edge and ten words "When making money" at the bottom. On the back of the money, there is a dragon in the center, with "Made in Guangxu (or Xuan Tong)" at the top and "Qing Imperial Copper Coin" (Qing Imperial Copper Coin) at the bottom.
OEM in different places is relatively unified. Casting began in 1900 (the 26th year of Guangxu reign) and ended in1910/year (the 3rd year of Xuantong reign), with short circulation time. Because of its elegant layout, exquisite carving and extremely rare existence, the copper coins made in Guangxu ten years of Qing Dynasty are regarded as one of the top ten honorary products of modern coinage in China.
References:
Baidu encyclopedia-Daqing copper coin