Find your perfect fit
Confirm Your Size
Make sure your ring fits the way it should. Take a moment to check your measurement so you can choose a size that feels comfortable, secure, and ready for everyday wear.
Sizing Guides
Quick Guide to Choosing Your Size
Step 1: Pick the Finger You Prefer
Select the finger you want to wear your ring on and make sure it feels comfortable for everyday use.
Step 2: Test the fit
Try the ring or sizing tool and check that it moves . smoothly while staying comfortably snug Read more
Step 3: Confirm Your Size
Pick the size that feels secure, balanced, and easy to wear throughout the day.
MEASURING YOUR RING SIZE
Wrap a strip of paper or string around the base of your finger, mark where it meets, and measure the length in millimeters. This gives you the circumference, which can be matched to the right size for your ULTRAVOOM Smart Ring.
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Outer Diameter Ø22.4 -
Inside Diameter Ø16.5 -
Circumference 51.8 -
Width 8
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Outer Diameter Ø23.3
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Inside Diameter Ø17.4
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Circumference 54.7
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Width 8
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Outer Diameter Ø24.1
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Inside Diameter Ø18.2
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Circumference 57.2
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Width 8
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Outer Diameter Ø24.9
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Inside Diameter Ø19
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Circumference 59.7
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Width 8
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Outer Diameter Ø25.8
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Inside Diameter Ø19.9
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Circumference 62.5
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Width 8
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Outer Diameter Ø26.6
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Inside Diameter Ø20.7
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Circumference 65
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Width 8
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Outer Diameter Ø27.4
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Inside Diameter Ø21.5
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Circumference 67.5
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Width 8
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Outer Diameter Ø28.2
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Inside Diameter Ø28.2
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Circumference 70.1
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Width 8
Outer Diameter
Inside Diameter
Circumference
Width
