号数(大陆)直径(mm)周长(mm) 号数(香港)直径(mm)周长(mm)
7--------------15.0-----------47 7--------------14.5-----------46
8--------------15.3-----------48 8--------------15.1-----------47.5
9--------------15.6-----------49 9--------------15.3-----------48
10-------------15.9-----------50 10-------------16.1-----------50.5
11-------------16.2-----------51 11-------------16.6-----------52
12-------------16.6-----------52 12-------------16.9-----------53
13-------------16.9-----------53 13-------------17.0-----------53.5
14-------------17.2-----------54 14-------------17.7-----------55.5
15-------------17.5-----------55 15-------------18.0-----------56.5
16-------------17.8-----------56 16-------------18.2-----------57
17-------------18.2-----------57 17-------------18.3-----------57.5
18-------------18.5-----------58 18-------------18.5-----------58
19-------------18.8-----------59 19-------------18.8-----------59
20-------------19.1-----------60 20-------------19.4-----------61