Method One:

In the measurement, the four long fingers (thumb excluded) and to the "tiger's mouth" at, forced those of some, and then measuring tools to measure, for example, happens to be 45 mm, then, on this basis, plus 2 ~ 3mm

Is suitable for your lap soon. This specification there will be some pain in the wearing, use hand sanitizer and other economic lubrication. Some people like to wear was a little bit loose, you can choose another slightly larger circle of the mouth.

Method Two:

Notes:

1. Venire caliper scale with "0" above the line for the correct scale, rather than the edge of the cursor;

2. The size of benchmark size, generally 1-2mm should be added to facilitate the bracelet to wear, the elderly, people who hand joints should be added to a larger hard 3-4mm.

Method three:

When the election, jade bracelets, jade bracelets to be able to wear into the four long fingers (except the thumb) and to the "tiger's mouth" at, I feel a little tight some, and then remove the bracelet, measure the diameter, for example, just 55mm, then, this size is suitable for your lap soon. Some people like to wear was a little bit loose, the choice to select the circle big mouth 1 to 2 mm, so that we can more easily put off, and there are some people used to wear a smaller bracelet, or wear is not going to take down, so, in turn, can reduce the size of 1 to 2 mm. Generally selected, should first try them on it. Try it on, you can put some detergent or soap and water in your hand, and asked people to help, wearing a bracelet with a point force into the wrist can be.

Method four:

Five fingers close together, asked people to help with a soft rope Measure the thickest part of your hand in the perimeter of the smallest state and then divided by 3.14, plus 1 ~ 2mm that is appropriate for your ID bracelet. For example: you measure the length of the bracelet is 170mm, so 170/3.14 1 ~ 2 = 55 ~ 56mm.

Notes:

These four methods, each with shortcomings, each of you the best possible methods to try, testing a few times more than averaged. This is more accurate.