USAU.K.ChinaJapanDiameterCircumference
599½2
6M1212¾2
7O1414¾2¼
8Q1616¾2¼
1717¾2¼
9S1818¾2¼
1919¾2½
102020¾2½
10¼U2121¾2½
10½2222¾2½
112323¾2½
12Y2525¾2¾
USAU.K.ChinaJapanDiameterCircumference
59915.649
6M121216.452
7O141417.354.5
8Q161618.157
171718.558.3
9S181818.959.5
191919.360.8
10202019.762
10¼U21212062.7
10½222220.1763.4
11232320.664.5
12Y252521.467.5