The circumference corresponding to ring size 51 is 51mm and the diameter is 16.23mm. Ring size 51 is the European ring size, and the ring number in the European ring comparison table is the circumference of the inner ring of the ring. Therefore, the circumference of ring size 51 is 51mm. According to the table, the corresponding inner ring diameter is 16.23mm.
Precautions for choosing ring size
1. Some rings are in the style of group setting with broken diamonds, and it is very troublesome to change the ring later, or even impossible to change it at all. Therefore, it is necessary to accurately measure the finger size, try to measure it several times, and take the average value.
2. According to the principle of thermal expansion and contraction, when buying a ring in winter, it is advisable to rotate the ring left and right after wearing it, but it is not easy to fall off. It is usually one to half a size smaller than in summer; In summer, it is advisable to feel slightly tight after wearing it.
3. When purchasing rings from domestic brands, it is necessary to compare them with the finger ring standards of domestic rings; When purchasing rings from foreign brands, it is best to measure the size according to the measurement method provided on their official website and compare it with the ring size comparison table on the website.