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Ring Size Conversion Chart

How to Measure Your Ring Size at Home
Option 1: Use a Ring That Already Fits
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Pick a ring that feels just right.
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Measure the inside diameter in millimeters.
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Match your measurement to the chart above.
Option 2: Wrap It Like a Tidal Current
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Cut a thin strip of paper or string.
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Wrap it around the base of your finger — not too loose, not too tight.
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Mark where it overlaps.
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Measure the length in millimeters (this is your finger circumference).
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Find the closest match on our chart.
Siren’s Sizing Tips
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Measure at the end of the day — when your fingers are most relaxed.
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Hands feel slimmer when cold — let them warm up before measuring.
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If you’re between sizes, go one up for comfort, especially for wider bands.
Still Not Sure? Ask a Siren.
Let us help you find your fit.
Drop me a message - I’ll be happy to guide you:​​​
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