Ringsizely

Ring size by finger

Charts assume the ring finger — but every finger is different. Here's how the others compare, and a converter to lock in the exact size once you've measured.

Ring size by finger
FingerHow it compares
Ring fingerThe baseline most charts assume. Average is about US 6–6½ for women and US 9–10 for men.
Index fingerUsually about a half to a full size larger than the same hand’s ring finger.
Middle fingerTypically the largest of the three middle fingers — often a half to one size above the ring finger.
ThumbThe largest digit. Thumb rings often run 2–4 sizes above your ring-finger size — always measure the thumb directly.
Pinky (little finger)The smallest. Pinky rings are commonly 1½–2½ sizes below your ring-finger size.
ToeA different category — toe rings are measured on the toe (often US 2–5) and are frequently adjustable.
These are rough guides — finger differences vary a lot by person. Always measure the actual finger you'll wear the ring on, then convert below.

Inch answer

Finger inches to ring size: around vs across

Multiply inches by 25.4, then match the correct measurement column.

2¼″ around57.2 mm circumference≈ US 8

¾″ across a ring19.05 mm inner diameter≈ US 9

Closest US ring size by finger circumference in inches
Around fingerCircumferenceClosest US sizeEU
2 in50.8 mm5.551
2.125 in54.0 mm754
2.25 in57.1 mm857
2.375 in60.3 mm9.561
2.5 in63.5 mm10.563

Do not enter a finger circumference as diameter: those are different measurements. If your number falls between rows, use the converter below and confirm with a second method.

Convert your measurement

Measurement unit

Input: 17.3 mm

Your size is US 7 (UK N½, EU 54).

Fit confidence Exact table match

Fit confidence 84/100 · High Inner diameter from a ring that already fits is usually the strongest home input. Re-measure across the widest inner points and check wide-band fit if needed.

US
7
UK
N½
EU / ISO
54
Japan
14
CH / IT / ES
14
Inner diameter, millimetres
17.32
Circ mm
54.4
Why this size?

Your input maps to US 7 — UK N½, EU 54, JP 14, Ø 17.32 mm.

Inner diameter is exact to about ±0.1 mm. String or on-screen methods add roughly ½–1 size of noise, so confirm with a second method before buying an expensive or non-resizable ring.

Open US 7 size guide

More options
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Ring fit fix advisor

Choose the fit problem and get the safest next step before resizing, replacing or buying another ring.

Wide band or comfort-fit Too loose or spinning Non-resizable or brand ring Smart-ring fit issue

Frequently asked questions

Which finger is ring size measured on?

Standard ring sizes assume the ring finger of the relevant hand. For any other finger, measure that finger directly — sizes differ noticeably between fingers.

What size is a thumb ring?

Thumb rings usually run 2–4 sizes larger than your ring-finger size because the thumb is the thickest digit. Measure your thumb directly rather than guessing from your ring-finger size.

Are pinky rings smaller?

Yes. The little finger is the slimmest, so pinky rings are typically about 1½–2½ sizes smaller than your ring-finger size.

Do both hands have the same ring size?

Not always. Your dominant hand is often a touch larger. Measure the exact finger and hand you’ll wear the ring on.

What ring size is a 2.25 inch finger circumference?

A finger circumference of 2.25 inches is 57.2 mm, closest to US ring size 8 (UK P½, EU 57). Measure around the finger, not across it.

What ring size is a 0.75 inch inner diameter?

An inner diameter of 0.75 inch is 19.05 mm, closest to US ring size 9 (UK R½, EU 60). Diameter is measured straight across the inside of a ring.