100% Free · No Printer · No App

Ring Size Calculator
Find Your Exact Fit

No printer. No guessing. Measure your ring size on-screen in 30 seconds.

Try Screen SizerString MethodI Have a Ring

Works on mobile  ·  India sizing included  ·  Free

On-Screen Calibrated Ring Sizer

No printer needed. Calibrate to your screen, then measure your finger or ring.

Match the circle to your finger or ring

Adjust until the circle fits snugly around your finger, or matches the inside of a ring you own.

Diameter: 17.3 mm

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Your Ring Size

🇮🇳 India14
🇺🇸 US7
🇬🇧 UKN
🇪🇺 EU54
🇯🇵 Japan13
🇨🇳 China13
🇦🇺 AUS7
Diameter17.3mm
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String / Paper Method

Wrap a strip of paper or string around your finger, mark where it overlaps, then measure and enter the length below.

1

Enter your finger measurement

Measure the length of the paper or string that wrapped around your finger.

Tip: Use a thin strip of paper, not string — paper gives a more accurate measurement.

I Have a Ring

Enter the inner diameter of a ring that already fits you, or hold it over the calibrated circle below.

A

Enter the ring's inner diameter

Measure across the inside of the ring with a ruler. Enter the measurement below.

B

Hold your ring over the circle

If you already calibrated your screen above, hold your ring over the circle and adjust until it matches the inside edge.

Uses the calibration from the screen sizer above. If you haven't calibrated yet, scroll up to calibrate first.

Diameter: 17.3 mm

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Ring Size (Circle Method)

🇮🇳 India14
🇺🇸 US7
🇬🇧 UKN
🇪🇺 EU54
Diameter17.3mm

India Ring Size Chart

Used by Tanishq, CaratLane, BlueStone, and most Indian jewelry retailers. Indian sizes run from 6 to 26+.

India SizeDia (mm)Circumference (mm)🇺🇸 US🇬🇧 UK🇪🇺 EU
614.144.33F44
714.545.63.5G46
814.946.84H47
915.348.14.5I48
1015.749.35J49
1116.150.65.5K51
1216.551.86L52
1316.953.16.5M53
1417.354.37N54
1517.755.67.5O56
1618.156.98P57
1718.558.18.5Q58
1818.959.49R60
1919.460.99.5S61
2019.862.210T62
2120.263.510.5U63
2220.664.711V65
232166.011.5W66
2421.467.212X67
2521.868.512.5Y68
2622.269.713Z70
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Full Ring Size Conversion Table

Complete international size chart — US, UK, EU, India, Japan, China, and Australia.

Dia (mm)🇺🇸 US🇬🇧 UK🇪🇺 EU🇮🇳 India🇯🇵 Japan🇨🇳 China🇦🇺 Australia
14.13F446553
14.53.5G467663.5
14.94H478774
15.34.5I489884.5
15.75J4910995
16.15.5K511110105.5
16.56L521211116
16.96.5M531312126.5
17.37N541413137
17.77.5O561514147.5
18.18P571615158
18.58.5Q581716168.5
18.99R601817179
19.49.5S611918189.5
19.810T6220191910
20.210.5U6321202010.5
20.611V6522212111
2111.5W6623222211.5
21.412X6724232312
21.812.5Y6825242412.5
22.213Z7026252513

Frequently Asked Questions

Everything you need to know about ring sizing.

What is my ring size?
Your ring size depends on your finger's circumference and diameter. The most accurate way to find it at home is to use our on-screen calibrated sizer above — no printer needed. Sizes vary by country: US uses numbers (3–13), UK uses letters (A–Z), India uses numbers (6–26), and EU uses circumference in mm.
How do I measure my ring size at home without a ring sizer?
Three methods work well at home: (1) Use our on-screen sizer — hold your phone near your finger or match a ring you already own. (2) Wrap a strip of paper around your finger, mark where it overlaps, then measure the length and enter it into our string calculator above. (3) Measure the inside diameter of a ring that already fits you with a ruler, then look it up in the conversion table above.
What is the Indian ring size equivalent to US size 7?
US size 7 corresponds to India size 14 (approximately 17.3mm inner diameter). Indian jewelry brands like Tanishq and CaratLane typically use this numbering system. Use our India ring size chart above for the full conversion table.
What is the average ring size for women?
The average ring size for women is US 6 (India size 12, UK L, EU 52) with an inner diameter of approximately 16.5mm. However, ring size varies significantly — sizes from US 4 to US 9 are all common for women. Always measure rather than assuming.
What is the average ring size for men?
The average ring size for men is US 10 (India size 20, UK T, EU 62) with an inner diameter of approximately 19.8mm. Men's sizes typically range from US 8 to US 14.
How do I measure ring size in inches?
Measure the inner diameter of a ring that fits you. Divide the measurement in inches by 0.0393701 to convert to millimeters, then look up that mm value in the conversion table. Alternatively, our string calculator accepts inches directly — enter your finger circumference in inches and we'll calculate your size instantly.
What is a virtual ring size calculator?
A virtual ring size calculator lets you measure your ring size on-screen without a physical ring sizer tool or printer. Our screen-calibrated sizer above works by first calibrating to your device using a credit card (a standard size), then letting you match an on-screen circle to your finger or an existing ring.
Is ring size based on diameter or circumference?
Both, but they measure the same thing from different angles. Diameter is the straight line across the inside of a ring. Circumference is the full distance around the inside. Since circumference = diameter × π, you can convert between them instantly. US, UK, and Indian sizing is typically looked up by diameter. European (EU) sizing uses circumference directly — EU size 54 means exactly 54mm inner circumference.
Can ring size change over time?
Yes. Fingers naturally change size due to temperature (larger when warm, smaller when cold), time of day (slightly larger in the evening), weight changes, pregnancy, and aging. For best accuracy, measure in the evening at room temperature, and measure the specific finger you plan to wear the ring on. If you're between sizes, size up for wide bands and size down for thin bands.
How to measure ring size for men at home?
Use the string method: wrap a thin strip of paper around the base of the finger you want to wear the ring on, mark where it overlaps, then measure the length. Enter this into our string calculator for an instant men's ring size in US, India, UK, and EU. Men's ring sizes typically range from US 8–14 (India 17–26). For wide bands (common in men's rings), go half a size up from your measured size for comfort.
How to use an online ring sizer?
Our online ring sizer has three methods: (1) Screen sizer — calibrate using a credit card, then match a circle to your ring or finger. (2) String calculator — wrap paper/string around your finger, enter the length. (3) Existing ring match — hold an existing ring over the on-screen circle. All three give instant results in US, India, UK, and EU sizing with no account, no download, and no printer required.
What is the ring size chart for India?
Indian ring sizes typically run from size 6 to size 26 (some brands go higher). India size 12 = US 6 = UK L = EU 52 = 16.5mm diameter. India size 14 = US 7 = UK N = EU 54 = 17.3mm. See the full India ring size chart section above for the complete table used by Tanishq, CaratLane, and BlueStone.
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Sizing Tips for the Best Fit

  • Measure in the evening — fingers are slightly larger then
  • Measure the exact finger you'll wear it on (right vs left hand differ slightly)
  • Wide bands need a half size up; thin bands fit true to size
  • Between sizes? Always go larger — a ring can be resized down more easily than up
  • For Indian jewelers: always confirm the sizing system they use (some use US sizing, some use Indian numbering)