[Jewelry making - Article 00154] - Re: [Orchid] International ring sizing standard

[Christine Pyman]

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    Hi Jim, here ring sizes are as follows - there is 1.3 mm difference
    between full sizes ( internal diameter) and.65 mm per half size, e.g
    size O is 56 mm, O and a half is 56.65 mm, P is 57.3 mm, etc. 

cheers, Christine in Sth Australia
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