戒指尺寸在唔同地區長度存在差異，下面提供香港、內地以及美國的尺寸換算表，令你可以快速根據自己的戒圍確定戒指尺寸。
| 圓周長（mm） | 內圈直徑（mm） | 香港 | 內地 | 美國 |
| 43.3 |
13.8
| 5 |
3
|
2.75
|
| 44.3 |
14.1
|
6
|
4
|
3
|
| 45.5 |
14.5
|
7
|
5.5
|
3.5
|
| 46.5 |
14.8
|
8
|
6.5
|
3.75
|
| 47.7 |
15.2
|
9
|
8
|
4.25
|
| 48.7 |
15.5
|
10
|
9
|
4.75
|
|
49.9
|
15.9
|
11
|
10
|
5.25
|
|
50.9
|
16.2
|
12
|
11
|
5.5
|
|
52.1
|
16.6
|
13
|
12
|
6
|
|
53.1
|
16.9
|
14
|
13
|
6.5
|
|
54.3
|
17.3
|
15
|
14
|
7
|
|
55.6
|
17.7
|
16
|
15.5
|
7.5
|
|
56.5
|
18.0
|
17
|
16.5
|
7.75
|
|
57.5
|
18.3
|
18
|
17.5
|
8.25
|
|
58.7
|
18.7
|
19
|
19
|
8.75
|
|
59.7
|
19.0
|
20
|
20
|
9
|
|
60.9
|
19.4
|
21
|
21
|
9.5
|
|
61.9
|
19.7
|
22
|
22
|
10
|
|
63.1
|
20.1
|
23
|
23
|
10.25
|
|
64.1
|
20.4
|
24
|
24
|
10.75
|
|
65.3
|
20.8
|
25
|
25
|
11.25
|
|
66.3
|
21.1
|
26
|
26
|
11.5
|
|
67.5
|
21.5
|
27
|
27.5
|
12
|
|
68.5
|
21.8
|
28
|
28.5
|
12.5
|
|
69.7
|
22.2
|
29
|
30
|
12.75
|
|
70.7
|
22.5
|
30
|
31
|
13.25
|
]]>
