19 ring is 18.8mm in the comparison table of rings in mainland China and 18.6mm in Hong Kong. When measuring the size of the ring, you can wrap a thin thread around the root of your finger. After marking, you can measure the length of the rope with a ruler and choose the appropriate ring according to the ring size comparison table. If the ring is small, it can be ground up; if it is large, it can be shrunk by winding silk thread above the ring.

19 ring is18.8mm. Generally speaking, the size of the ring is divided into mainland version and Hong Kong version. In the mainland version of the ring comparison table, the ring numbered 19 has a diameter of 18.8mm and a circumference of 59 mm. In the Hong Kong version of the ring comparison table, the ring numbered 19 has a diameter of18.6 mm.

When measuring the size of the ring, you can use a thin line without elasticity to measure it. You can wrap a thin thread around the root of the finger wearing the ring, mark it with a marker, then measure the length of the rope with a ruler, and finally choose the right ring according to the ring size table. It is suggested to do it several times, take the average and reduce the error.

If the ring is small, you can grind it up and take it to the jewelry store. Professionals will use special instruments to thin the rings, which can increase the number of rings to a certain extent and make the number of rings bigger. When the ring is worn too large, a layer of silk thread can be wound above the ring to achieve the purpose of shrinking the ring.