Size is an English word, which means: measurement and calibration, that is, the circumference is 60 mm and the diameter is18.3 mm.
According to the international standard ISO 8653: 1986 (China district), the minimum hand size is 39. 1mm, and the diameter is 12.5mm, which is set to NO. 1; The maximum hand inch has a circumference of 69.7mm and a diameter of 22.2mm, and is set to No.27, with 27 numbers.
Hand inch is a technical term in the jewelry industry, not the size of the ring. According to the diameter and circumference of the inner ring of the ring, it is divided into different ring numbers, which is convenient for production and wearing.
Extended data:
Direct measurement method of ring size: cut a piece of paper with a width not exceeding 1 cm, and the edge should be flat to reduce the measurement error. Wrap the note around the finger with the ring. Finger skin is slack, try to stick it tightly and mark the junction. Measure the length from the end of the note to the mark with a ruler, which is the circumference of the finger.
Indirect measurement method of ring size: take out the old ring and measure the inner diameter of the ring, or take it directly to the jewelry store for professional measurement.
Note on ring size: Generally speaking, the finger measured in winter is one or half size thinner than that in summer. If it is measured in winter, it is best to reserve this error.
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