Indian Ring Size Chart in MM, and How to Measure at Home

We make rings, which means we also resize them, and we see the same four mistakes come back to the bench over and over. None of them are about the tape or the string. They are about when and how the finger was measured.

So this guide is ordered by accuracy, not by convenience. If you can do method one, do method one and stop reading.

Method 1 — measure a ring she already wears

The most accurate thing you can do is not measure a finger at all. Measure a ring that already fits the finger you are buying for.

1. Take a ring that fits that exact finger. Not a ring from the other hand. The dominant hand runs about half a size larger on most people, and the ring finger and middle finger are rarely the same.
2. Measure the inner diameter with a ruler. Lay the ring flat. Measure straight across the inside edge to inside edge, through the centre, in millimetres. Do it three times and take the middle reading. A steel ruler beats a tape.
3. Read the size off the chart below. That is the Indian size.

One caution. A wide band sits tighter than a thin one at the same size, because more metal is in contact with the finger. If the ring you are measuring is thin and the ring you are buying is 6 mm wide or more, tell us — that is a real difference, not a rounding error.

Method 2 — the paper strip

If there is no existing ring, measure the finger directly. Use paper, not string — string stretches, and the stretch is always in the direction that makes the ring too big.

1. Cut a strip of printer paper about 8 mm wide.
2. Wrap it around the base of the finger. Snug, not tight — it should turn, but not slide off without a little resistance.
3. Before you unwrap, slide the loop over the knuckle. If it will not pass, the ring will not either. Loosen until it just clears, and mark that.
4. Unwrap and measure to the mark in millimetres. That is the circumference. Repeat on three different occasions — not three times in one minute.

Method 3 — the printed sizer, and why we rank it last

Plenty of sites give you a PDF of printable circles. They work, with one condition almost nobody mentions: your printer has to print at exactly 100%.

“Fit to page” and “shrink oversized pages” are on by default in most print dialogs, and either one will silently scale the sheet by three or four percent. That is roughly a full size. If you use a printed sizer, put a ruler against the printed scale bar first and confirm 50 mm measures 50 mm. If it does not, reprint with scaling off.

Screen sizers — where you drag a ring image until it matches — are worse, because browser zoom and screen density both interfere. We would rather you used a paper strip.

The Indian ring size chart

Indian sizes run from 1 to 30. Most adult women’s rings fall between 10 and 18; most men’s between 18 and 26.

Indian size	Inner diameter	Circumference	Usually
8	15.3 mm	48.0 mm	Small women’s
9	15.5 mm	48.7 mm	Small women’s
10	15.9 mm	50.0 mm	Women’s
11	16.3 mm	51.2 mm	Women’s
12	16.5 mm	51.9 mm	Women’s — most common
13	16.9 mm	53.1 mm	Women’s — most common
14	17.3 mm	54.4 mm	Women’s — most common
15	17.5 mm	55.1 mm	Women’s
16	17.9 mm	56.3 mm	Women’s
17	18.1 mm	57.0 mm	Women’s / small men’s
18	18.5 mm	58.3 mm	Men’s
19	18.8 mm	58.9 mm	Men’s
20	19.2 mm	60.2 mm	Men’s — most common
21	19.4 mm	60.8 mm	Men’s — most common
22	19.8 mm	62.1 mm	Men’s — most common
23	20.0 mm	62.7 mm	Men’s
24	20.4 mm	64.0 mm	Men’s
25	20.6 mm	64.6 mm	Large men’s
26	21.0 mm	65.9 mm	Large men’s

Sizes 1–7 and 27–30 exist and we make them. They are simply rare enough that printing them here would make the table harder to read. Ask us.

Four things that make a measurement wrong

These are the actual causes of the resizes we see. Not one of them is about technique.

Measuring cold

Fingers shrink in cold and swell in heat. A hand measured in an air-conditioned room in the morning can be most of a size smaller than the same hand at four in the afternoon. Measure warm, at the end of the day, and never straight after a shower or a workout.

Measuring once

One reading is a data point, not a size. Take three on three separate days and use the largest — a ring that is slightly loose is wearable, and a ring that will not go on is not.

Forgetting the knuckle

The ring has to pass the knuckle, then sit at the base. If the knuckle is much wider than the base, size for the knuckle and tell us — we can fit sizing beads inside the band so it does not spin once it is on.

Salt, flights and pregnancy

A salty meal the night before, a long flight, or any stage of pregnancy will change a finger by a measurable amount. If any of those apply this week, wait and measure another week.

If you land between two sizes

Go up, with three things worth knowing:

• A wide band — 6 mm or more — sits tighter than a thin one, so going up is even more clearly right.
• A large knuckle means going up can leave the ring spinning at the base. Size for the knuckle, then ask for beads.
• An eternity ring, with stones all the way round, cannot be resized later without remaking it. Get this one measured properly before ordering, not after.

That last point is the one worth acting on. A solitaire or a plain band can be taken up or down at the bench afterwards. A full eternity band cannot — the stones go all the way round, so there is nowhere to cut.

If it is a surprise and you cannot ask

1. Borrow a ring she already wears for one evening and measure the inner diameter. This is the only method here that is actually reliable.
2. Ask someone whose own ring size is known and whose hands are similar, then compare directly, finger against finger.
3. Order the most common size and plan to resize. In India that is 12–14 for women and 20–22 for men. Treat this as the fallback it is — and avoid it entirely for full eternity designs.

Common questions

Is Indian ring size the same as US ring size?

No. They are different scales and the numbers do not correspond — an Indian 12 is not a US 12. If you have a US, UK or European size, send us that instead and say which system it is, and we will convert it. Do not read a US number off an Indian chart.

Can a ring be resized after it is made?

Most can. A plain band or a solitaire can usually go up or down a size or two at the bench. Rings that cannot be resized easily are full eternity bands and anything with stones set around the entire shank. Ask us about the specific design before ordering if size is uncertain.

What is the most common ring size in India?

For women, Indian sizes 12 to 14 — an inner diameter of roughly 16.5 mm to 17.3 mm. For men, sizes 20 to 22, roughly 19.2 mm to 19.8 mm. These are the sizes we make most often, but they are a fallback for a surprise, not a substitute for measuring.

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If you are unsure, send us the millimetre reading rather than the size. A number we can check beats a size somebody guessed at. We are a lab-grown diamond manufacturer in Surat, making since 2010 — every piece is cast for the order, so it is made to your size rather than resized into it.