The inner diameter of the US size 7 ring is 17.3mm, and the inner circumference is 54.4mm. Ring size, also known as ring rim size, is completely different in the United States and China. US size 7 is equivalent to size 14 of a Chinese ring and generally belongs to women's rings.
How to read the ring size chart
1. Firstly, confirm which ring size chart is used for the brand of the ring you purchased.
2. Secondly, it is important to understand the meaning of the parameters in the ring size chart. Ring size refers to the size of the ring, inner circumference refers to the circumference of the inner ring of the ring, and inner diameter refers to the length of the diameter of the inner ring of the ring.
3. After measuring the finger circumference, refer to the corresponding ring size comparison table and select the ring number corresponding to the inner ring length close to the finger circumference.