Ring Size Conversion Chart

Ring Diameter (MM)UKUSA/CanadaJapanSwitzerlandGermanyFrance
14.0 mmF
3441444
14.4 mmG14½45½
14.8 mm471546½
15.2 mm8815¼47¾
15.6 mm5915¾49
16.0 mmL10½10¾1650¾
16.5 mmM61212¾16½51½
16.9 mmN13141752¾
17.3 mmO71415¼17¼54
17.7 mmP1516½17¾55¼
18.2 mmQ81617¾1856¾
18.6 mm1718½18½58
19.0 mm918201959¼
19.4 mm192119½60¾
19.8 mm102021¾2061¾
20.2 mm10½2222¾20¼62¾
20.6 mm11232420¾64¼
21.0 mm11½24 25¾2166
21.4 mmY122527½21¼67¼
21.8 mmZ12½2628¾21¾68
22.2 mm132729¼2269
22.6 mm13½