The ring size range in China is 4-26, in Europe it is 44-61, and in the US it is 5-12. Therefore, the size of ring 7 may be in either China or the US, depending on the ring brand.
What is the size of ring 7 in centimeters
The size standard of No. 7 ring in Chinese Mainland is 4.7 cm in circumference and 1.5 cm in diameter;
The 7th ring has a circumference of 4.6 centimeters and a diameter of 1.43 centimeters according to the Hong Kong ring size standard;
The 7th ring has a circumference of 5.4 centimeters and a diameter of 1.73 centimeters according to the American ring size standard.
What size difference can a ring have in winter and summer
According to the principle of thermal expansion and contraction, due to the colder weather, fingers are one to half sizes thinner than in summer, and rings are one to half sizes thinner in winter and summer. It is advisable to buy a ring in winter, which can rotate left and right after wearing but is not easy to fall off.