Find Your Ring Size in 4 Steps

1💳

Calibrate Screen

Place your credit card on screen and drag the slider to match. Saved forever after first use.

2🧵

Wrap Your Finger

Wrap a thin paper strip around your ring finger and mark the overlap with a pen.

3📏

Measure on Ruler

Click Full-Screen Ruler and place the strip at 0mm. Read the circumference in mm.

4📊

Match the Chart

Use the ring size chart below to find your US, UK, EU, or Indian ring size.

International Ring Size Chart (mm → US / UK / EU / India)

Circumference (mm)Diameter (mm)US SizeUK SizeEU SizeIndian Size
46.814.94H477
47.815.24.5I488
49.315.75J½499
50.316.05.5K½5110
51.916.56L½5211
53.116.96.5M½5312
54.417.37N½5514
55.717.77.5O½5615
57.018.18P½5716
58.318.58.5Q½5918
59.518.99R½6019
62.119.810T½6222
64.720.611V½6525
67.221.412X½6727

Circumference = inner circumference of the ring. Measure your finger using the string method above.

How to Accurately Find Your Ring Size at Home

Getting your ring size wrong is one of the most common frustrations with online jewelry shopping. Resizing a ring costs money and time, and some ring styles (eternity bands, tension-set rings) can't be resized at all. This free tool lets you find your exact ring size at home using only a screen, a piece of paper, and a pen — no jeweler visit needed.

The String / Paper Strip Method (Most Reliable)

  1. Cut a strip of paper about 6mm wide and 10cm long
  2. Wrap it snugly around the base of the finger you're sizing (where the ring will sit)
  3. Mark the point where the paper overlaps with a pen — this is your finger's circumference
  4. Measure the strip from end to mark using the Full-Screen Ruler
  5. Match your circumference in mm to the ring size chart above

Tips for Accuracy

  • Time of day matters: Fingers are largest in the evening — measure then for the most wearable fit
  • Temperature matters: Cold shrinks fingers, warmth expands them. Measure at room temperature
  • Knuckle check: The ring must pass over your knuckle. If your knuckle is much larger than your base, size for the knuckle and consider a sizing band insert
  • Dominant hand: Your dominant hand is typically 0.5–1 size larger — measure the actual finger you'll wear the ring on
  • Wide bands: Wide bands (over 6mm) sit tighter. Go up half a size for bands wider than 6mm

Ring Size FAQ

How do I find my ring size online for free?

Calibrate the screen ruler with a credit card, use Full-Screen Ruler mode, measure your finger circumference with a paper strip, then find your size in the chart on this page.

What is the most common women's ring size?

US Size 6 (51.9mm circumference, 16.5mm diameter) is the most common for women. Sizes 5–7 cover the majority.

What is the most common men's ring size?

US Size 9 to 10 (59.5–62.1mm circumference) is the most common range for men.

Should I size up or down if I'm between sizes?

Go up half a size. It's easier to add a sizing insert than to resize a ring that's too small.

Do wide bands need a different size?

Yes. Wide bands (over 6mm) feel tighter on the finger. Go up 0.5 to 1 full size for wide-band rings.

Can I measure an existing ring?

Yes — measure the inner diameter of an existing ring that fits well and match it to the diameter column in the chart above.