Product information:
[Specification] ring wall: 0.15cm
[material] 925 silver + platinum plating + Cuoshi

Measurement steps:
Preparation tools: non elastic rope or paper, tape or ruler;
Use a rope around the ring wearing part, tighten it to the desired degree, and keep the rope free from deflection;
Use a fine marker to mark the contact point;
The record is accurate to millimeter;
It is recommended to measure more than three times and take the average value.