戒指尺寸测量方法：
1.找到一条细绳或者不到1-2厘米宽度的纸条，围绕合适手指的基部。
2.用一支钢笔在纸条上或者绳子的交叠处，即形成一个圈的地方做一个标记。
3.用直尺或软尺，测量从绳子的开始一端到做标记的地方的长度。
4.使用这个尺度然后对照以下图表决定您的戒指的尺寸。

号码                內圈長 MM                    內直徑MM
4                       44                               14.0
5                       45                               14.3
6                       46                               14.6
7                       47                               15.0
8                       48                               15.3
9                       49                               15.6
10                      50                              15.9
11                      51                              16.2
12                      52                              16.6
13                      53                              16.9
14                      54                              17.2
15                      55                              17.5
16                      56                              17.8
17                      57                              18.2
18                      58                              18.5
19                      59                              18.8
20                      60                              19.1
21                      61                              19.4
22                      62                              19.7
23                      63                              20.1
24                      64                              20.4
25                      65                              20.7
26                      66                              21.0