Ring size guide

Find your fit.

Three simple ways to your US ring size — pick the one that suits you. When in doubt, we’ll mail you a sizer, on us.

Jump to the size finder & chart
01Most accurate at home
AIOVO reusable ring sizer

Get a free ring sizer

We’ll mail you a reusable sizer at no cost — no purchase needed. Slip it on and read your size in the little window.

Request my free sizer
02Exact conversion

Convert a size you know

Have a size from another country, or a measurement in millimeters? See its US equivalent in seconds.

Open the size finder
03Rough estimate
Measure with paper

Measure with paper

No sizer on hand yet? A paper strip and a millimeter ruler give you a starting point to confirm later.

See the method
Size finder & chart

Convert any size to US.

Pick the sizing system you know, then your size. Prefer to scan every size at once? Switch to the full chart.

1 · The sizing system you know
2 · Your US size
Your US size
6 US · Canada · Mexico
UKUK · AustraliaAustralia, Ireland, New Zealand, South Africa
L 1/2
FranceFranceFrench sizing
52
GermanyGermanyRussia, Ukraine, Asia
16 1/2
JapanJapan · ChinaIndia, China, South America, Turkey, Israel
12
ItalyItaly · SpainSpain, Netherlands, Switzerland
11 1/2
Inside circumference 2.04 in
51.9 mm
Want to be certain? Confirm with a free ring sizer.Confirm with a free ring sizerRequest yours

This is a size reference, not a list of sizes available to order. Choose from the sizes on each product page, or contact us about custom sizing.

International equivalents are approximate; a dash means none is listed. Sizing systems vary by country and retailer — check your ring’s sizing system rather than choosing by nationality.
Measure at home

The paper strip method.

Four quick steps for a starting point, using a strip of paper and a real millimeter ruler.

Rough estimate only. Paper can stretch, slip or twist. Confirm your size with a physical ring sizer or a jeweler before ordering. Get a free ring sizer
  1. Cut a narrow paper strip
    Step 1 of 4

    Cut a narrow paper strip

    Use a straight, even strip. Keep it flat and untwisted.

  2. Wrap it gently
    Step 2 of 4

    Wrap it gently

    Wrap once around the base of the intended finger. Keep it snug without pressing into the skin.

  3. Mark where the ends meet
    Step 3 of 4

    Mark where the ends meet

    Mark the strip exactly where its starting edge meets the overlapping end.

  4. Measure start to mark
    Step 4 of 4

    Measure start to mark

    Lay the strip flat against a millimeter ruler, starting at zero. Enter that number in the size finder under “Inside mm”.

Swipe for all four steps

Illustrations only — not to scale. This method doesn’t check knuckle clearance or final ring fit.

Enter my measurement

Small details make a difference.

Keep it natural

Measure when your hands feel normal, rather than unusually cold, hot or swollen.

Check again

Finger size can change during the day. Compare measurements at different times.

Mind the knuckle

Your ring should pass the knuckle with gentle resistance and sit comfortably at the base.

Consider the band

Wide bands can feel tighter. Try a sizer with a similar width instead of automatically going up half a size.

Questions

A few common questions.

Try both sizes using a physical ring sizer, ideally with a similar band width. Choose with knuckle clearance and comfort in mind. Still unsure? Contact us before ordering — there isn’t one size-up rule for every ring.

If possible, have a jeweler measure a ring your recipient already wears comfortably on the intended finger and hand. Avoid guessing from appearance or an average ring size.

Not necessarily. Measure the exact finger and hand where the new ring will be worn. A size that fits one finger may not fit another.

Only for a rough estimate. Tension, placement and material change the result, and a strip doesn’t replicate the fit of a rigid ring. Confirm with a jeweler or a physical ring sizer before ordering.

Yes. The sizer and its shipping are on us, with no purchase required. Request yours here.

Contact AIOVO about your ring and the adjustment you need before arranging a return.

Still unsure about your size?

Tell us which ring you’re considering and how you measured. We’ll help you work through the next step.

Contact AIOVO

Reassurance after delivery

AIOVO offers complimentary ring resizing within 60 days of delivery. Contact us to discuss the adjustment you need.

Warranty & Resizing

Still between sizes? We’ll send you a sizer.

A complimentary, reusable ring sizer — mailed to your door, no purchase needed.

Request my free sizerShop engagement rings