The number of rings is also called "hand inch", and the hand inch is expressed by the number in millimeters.

Hand inch 5, diameter 13.7mm, circumference 43 mm

Hand inch 6, diameter 14. 1mm, circumference 45 mm.

Hand inch 7, diameter 14.4mm, circumference 46 mm

Hand inch 8, diameter 14.8mm, circumference 47.5 mm

Hand inch 9, diameter 15. 1mm, circumference 48 mm.

Hand inch 10, diameter 15.4mm, circumference 50.5 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.

Extended data

Precautions for wearing a ring

1, it should be noted that our fingers expand with heat and contract with cold every day, and our fingers will change slightly with the seasons. When buying a ring by hand, it is advisable to wear it tightly in summer, and it is advisable to turn it around in winter without falling off.

2. When you feel that the ring is a little tight and you feel stuck, you should be on your guard. You can go to the jewelry store to modify the size. Don't be afraid of trouble, just wear it. We should be careful to nip in the bud! If you don't pay attention at that time and don't deal with it in time, you will regret it when the ring is stuck in your hand and can't be taken off!

3, sleep at night without a ring, people who sleep with a ring will generally have mild edema after waking up in the morning. Although the edema time is not long, if you don't take off the ring before going to bed at night, you will get stuck in the vein in the morning because your fingers are swollen. Poor venous blood circulation will cause swelling, and the finger swelling ring will definitely get stuck on your finger, which will also cause pain.

When buying a ring, be sure to measure the finger size accurately. You can wrap your fingers with a rope first, then measure your circumference, and then go to the special wedding diamond ring table to find the number. But because the joint is slightly larger than the width of the finger, you can't wrap the rope too tightly, so leave a spare place.