Size Guide

Size Guide

Ring Diameter (mm)UKUS/CanadaFranceGermanyJapanSwitzerland
15.6 mm54915¾9
16.0 mmL50¾1610½10¾
16.5 mmM651½16½1212¾
16.9 mmN52¾171314
17.3 mmO75417¼1415¼
17.7 mmP55¾17¾1516½
18.2 mmQ856¾181617¾
18.6 mm5818½1718½

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