[Jewelry making - Article 00401] - [Orchid] Hitting the right ring size

[Jonathan Silo]

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Dear all,

    Does a ring hole have to be round? 

    I'll explain: Let's say I want to create a size 7 ring, which means
    the diameter should be roughly 17.3 mm. I file the hole on a ring
    anvil wrapped in sand paper, while checking the size with a caliper. 

    Problem is for some reason the hole doesn't come out perfectly round
    - while the diameter between two points is 17.3, between other
    points it may be 17.1, 17.4, etc. 

    Question is: 

    1. Does this matter? will this bother the person with a size 7
    finger? 

    2. Can anyone share his or her method for creating "the perfect
    hole"? 

Thanks in advance,
Jonathan
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