The 6.8cm finger is the European version of the 68mm ring, corresponding to a circumference of 68mm and a diameter of 21.65mm. Finger circumference of 6.8cm refers to a circumference of 68mm. The circumference of ring sizes in China ranges from 44mm to 67mm, while the circumference of American ring sizes ranges from 49.3mm to 67.2mm, and the circumference of European ring sizes ranges from 40mm to 75mm. Therefore, the 6.8cm finger needs to wear a European version 68 ring or a customized ring.
What to pay attention to when measuring ring size
1. It is recommended to choose a thin rope or paper without elasticity for measuring PROPS, and not to use cotton thread or rubber bands.
2. When reading values, the line of sight should be parallel to the scale being read to avoid errors caused by different angles, preferably accurate to 0.1mm.
3. Due to the easy thermal expansion and contraction of finger blood vessels, there may be deviations in measurements at different temperatures and seasons. Measurements may be tighter in summer and looser in winter. It is recommended to take the average of multiple measurements at different times.
4. There are different versions of the ring size comparison table, such as international version, mainland version, Hong Kong version, etc. Different versions correspond to different ring sizes. When purchasing, it is important to be clear which version of the ring size chart the brand is using.