Indian ring sizes are a numbered scale, not a measurement, so the number on its own can mislead. The figure that travels between jewellers, countries and online shops is the inner diameter or circumference in millimetres. This page gives both for every men's size, with US and UK equivalents, and explains exactly how the numbers were checked so you can trust them when ordering a ring you cannot try on.
Indian ring size chart for men (sizes 10 to 30)
Find your inner diameter or inner circumference, then read across. Diameters are rounded to 0.1 mm; US and UK sizes are the nearest standard equivalent.
| Indian size | Inner diameter (mm) | Inner circumference (mm) | US / Canada | UK |
|---|---|---|---|---|
| 10 | 15.9 | 50 | 5¼ | K |
| 11 | 16.2 | 51 | 5¾ | L |
| 12 | 16.6 | 52 | 6 | L½ |
| 13 | 16.9 | 53 | 6½ | M½ |
| 14 | 17.2 | 54 | 6¾ | N |
| 15 | 17.5 | 55 | 7¼ | O |
| 16 | 17.8 | 56 | 7½ | P |
| 17 | 18.1 | 57 | 8 | P½ |
| 18 | 18.5 | 58 | 8½ | Q½ |
| 19 | 18.8 | 59 | 8¾ | R |
| 20 | 19.1 | 60 | 9¼ | S |
| 21 | 19.4 | 61 | 9½ | T |
| 22 | 19.7 | 62 | 10 | T½ |
| 23 | 20.1 | 63 | 10¼ | U½ |
| 24 | 20.4 | 64 | 10¾ | V |
| 25 | 20.7 | 65 | 11¼ | W |
| 26 | 21.0 | 66 | 11½ | X |
| 27 | 21.3 | 67 | 12 | X½ |
| 28 | 21.6 | 68 | 12¼ | Y½ |
| 29 | 22.0 | 69 | 12¾ | Z |
| 30 | 22.3 | 70 | 13 | Z+1 |
For centimetres, divide the millimetre figure by 10: size 20 is 1.91 cm across and 6.0 cm around. For inches, divide the millimetres by 25.4: size 20 is about 0.75 inches across.
How this chart was checked
The Indian column uses the scale most Indian jewellers publish: size 1 at about 41 mm of inner circumference, with each size adding about 1 mm. Diameter is circumference divided by pi. We cross-checked every row against three independent charts: a published Indian jeweller's international size chart (which lists size 20 at 60 mm and size 25 at 65 mm), a second Indian jeweller's men's chart (size 20 at 19.1 mm), and the multi-country equivalency table in the encyclopaedia entry on ring size (size 20 at 60.2 mm). All agree within about 0.5 mm, which is less than half a size.
The US column comes from the US standard, where each whole size adds 0.032 inches (about 0.81 mm) of inner diameter and US 10 measures 19.76 mm across, as tabulated on this reference of US ring size dimensions. The UK column follows British Standard 6820 (1987), which fixes UK size A at 37.5 mm of circumference and adds 1.25 mm per letter, as set out in this table of British ring sizes. Each US and UK entry is the standard size nearest to the Indian circumference.
Why do Indian ring size charts disagree?
Because no national standard defines the Indian scale, charts from different jewellers can differ by up to one size, most often above size 20. Foreign sizes also fall between Indian whole sizes: US 7 is 54.4 mm around, which sits between Indian 14 (54 mm) and Indian 15 (55 mm), so one chart lists it beside 14 and another beside 15. Both are within a millimetre; neither is wrong.
There is a second, bigger trap. Many fashion, steel and titanium ring sellers label sizes by the inside diameter in whole millimetres, so their "size 20" is a 20 mm ring. On the jeweller's scale, a 20 mm ring is about size 22. Before ordering, check whether a seller's size numbers match the diameters in the table above.
| What the seller calls "size 20" | Inner diameter | Inner circumference |
|---|---|---|
| Jeweller's Indian scale | 19.1 mm | 60 mm |
| Diameter-in-mm labelling | 20.0 mm | 62.8 mm |
How to convert European, Swiss and other sizes
Most other systems convert easily once you have the circumference in millimetres. Use the table below with the circumference column of the main chart.
| System | How the size is defined | Indian size 20 equals |
|---|---|---|
| ISO 8653 (much of continental Europe) | Inner circumference in mm | 60 |
| Italy, Spain, Switzerland | Circumference in mm minus 40 | 20 |
| Germany, Netherlands | Inner diameter in mm | about 19 |
| US and Canada | Numbered scale, 0.032 inch of diameter per size | 9¼ |
| UK, Ireland, Australia | Letters, 1.25 mm of circumference per size | S |
The Italian and Swiss rule (circumference minus 40) produces almost the same number as the Indian jeweller's scale, which is a useful check if you are buying abroad. The US conversion also has a shortcut: multiply the US size by 2.55 and subtract 3.5 for the approximate Indian size, so US 10 is about Indian 22.
What is the average ring size for men?
Indian jewellers' charts generally treat sizes 17 to 25 as the men's range. US jewellers often describe the average man as US 9 to 10, which is about Indian 19 to 22. Treat these as starting points for a gift, not a prediction for any one hand: finger size varies with build, age and which finger the ring is for.
If you are buying for someone else, borrowing a ring he already wears on the same finger and measuring its inside diameter will beat any average. Our guide to measuring ring size at home walks through that and three other methods.
How band width and shape change the fit
The chart describes the inside of the ring, but the same inner diameter feels different depending on the band. Wider and flatter bands grip more of the finger.
| Band | How it fits | Size advice |
|---|---|---|
| Thin, 2 to 4 mm | True to chart | Order your measured size |
| Wide, 6 mm or more, flat inside | Feels snug | Consider about half a size up |
| Comfort fit (domed inside) | Slides easily over the knuckle | Usually your measured size |
| Eternity band set all round | Cannot be resized easily | Measure carefully; do not guess |
For wide or fully set bands, confirm the fit with the maker before production. If a ring already made turns out wrong, see can a ring be resized for what a jeweller can and cannot do.
How to use this chart with AXIOM rings
AXIOM ring pages list sizes as S, M and L, with a product-specific inner diameter in millimetres for each, because the same letter can mean a slightly different fit on a slim band and a heavy one. Read the diameter, not the letter, and match it to your own measurement; the four-step method is in our sizing FAQ. If you fall between two sizes on any of the men's rings and bands, choose the larger one.
The practical takeaway
Write down your size as a number and a measurement, for example "Indian 20, 19.1 mm inside, 60 mm around". With the millimetre figure you can order confidently from any jeweller, in any country, whichever scale they use. Planning a kada or bracelet too? Those are sized differently; see the kada size guide.
