Already know your Indian ring size? Enter any size from 1 to 26 and instantly see diameter, circumference and approximate US, UK, EU and Japan conversions.
The Ring Size Chart Manual Entry Size Calculator is designed for people who already know an Indian ring size number but need the measurements or equivalent international sizes behind that number. Instead of measuring a finger again, simply enter an Indian size from 1 to 26. The tool instantly looks up the matching inner diameter, circumference, and approximate US, UK/Australia, EU/ISO and Japanese size.
This is useful when checking an old jewellery receipt, comparing two jewellers, shopping online, confirming a remembered ring size, or converting an Indian size before buying from an international website. Because international systems do not always align perfectly, the result also shows the physical measurements in millimetres so you can compare the underlying ring opening rather than relying only on labels.
If you do not know your Indian ring size yet, use our Ring Size Calculator India or Find My Ring Size India tool first.
Type a whole Indian size from 1 to 26 to view its complete chart details
| Indian Size | Diameter | Circumference | US / Canada | UK / Australia | EU / ISO | Japan |
|---|---|---|---|---|---|---|
| Indian Size 1 | 13.1 mm | 41.0 mm | 1.75 | B | 41 | 1 |
| Indian Size 2 | 13.3 mm | 41.7 mm | 2 | C | 42 | 2 |
| Indian Size 3 | 13.7 mm | 42.9 mm | 2.5 | D | 43 | 3 |
| Indian Size 4 | 13.9 mm | 43.6 mm | 3 | E | 44 | 4 |
| Indian Size 5 | 14.1 mm | 44.2 mm | 3.5 | F½ | 44 | 5 |
| Indian Size 6 | 14.5 mm | 45.5 mm | 3.75 | H | 46 | 6 |
| Indian Size 7 | 14.9 mm | 47.1 mm | 4.25 | I½ | 47 | 7 |
| Indian Size 8 | 15.0 mm | 48.0 mm | 4.5 | J | 48 | 8 |
| Indian Size 9 | 15.4 mm | 49.0 mm | 5 | K½ | 49 | 9 |
| Indian Size 10 | 15.7 mm | 50.0 mm | 5.5 | L½ | 50 | 10 |
| Indian Size 11 | 16.0 mm | 51.2 mm | 5.75 | M½ | 51 | 11 |
| Indian Size 12 | 16.4 mm | 51.8 mm | 6 | N | 52 | 12 |
| Indian Size 13 | 16.7 mm | 53.1 mm | 6.5 | O | 53 | 13 |
| Indian Size 14 | 17.1 mm | 54.0 mm | 7 | P | 54 | 14 |
| Indian Size 15 | 17.4 mm | 55.0 mm | 7.25 | Q | 55 | 15 |
| Indian Size 16 | 17.8 mm | 56.3 mm | 7.75 | R | 56 | 16 |
| Indian Size 17 | 18.0 mm | 57.0 mm | 8 | S | 57 | 17 |
| Indian Size 18 | 18.4 mm | 57.8 mm | 8.5 | T | 58 | 18 |
| Indian Size 19 | 18.7 mm | 59.1 mm | 9 | U | 59 | 19 |
| Indian Size 20 | 19.1 mm | 60.0 mm | 9.5 | V | 60 | 20 |
| Indian Size 21 | 19.4 mm | 60.9 mm | 10 | W | 61 | 21 |
| Indian Size 22 | 19.7 mm | 61.9 mm | 10.5 | X | 62 | 22 |
| Indian Size 23 | 20.0 mm | 62.8 mm | 11 | Y | 63 | 23 |
| Indian Size 24 | 20.4 mm | 63.8 mm | 11.5 | Z | 64 | 23 |
| Indian Size 25 | 20.7 mm | 64.7 mm | 12 | Z+1 | 65 | 24 |
| Indian Size 26 | 21.0 mm | 66.0 mm | 12.5 | Z+2 | 66 | 25 |
If a receipt says “Indian Size 12,” enter 12 to recover the approximate physical dimensions and international equivalents.
Compare your known Indian size against a seller that lists US, UK or EU sizing without measuring your finger again.
Use the millimetre diameter and circumference to compare two sizing charts that label the same physical ring differently.
If you already know the recipient’s Indian size, use the lookup to shop on international websites more confidently.
Keep the PDF result on your phone when buying jewellery abroad so the seller can see both the Indian size and measurements.
Create a simple PDF record of a known size for future purchases, resizing discussions or family jewellery notes.
A ring-size number is only a label. The physical opening of the ring is what determines whether it can pass over the knuckle and sit comfortably at the base of the finger. That is why this Ring Size Chart Manual Entry Size Calculator shows both inner diameter and inner circumference with every lookup.
Diameter is measured straight across the inside opening of the ring. Circumference describes the distance around that opening. When comparing size systems, these millimetre values are often more dependable than simply matching one national size label to another, especially near conversion boundaries.
After you manually enter an Indian size, the tool provides approximate equivalents for US/Canada, UK/Australia, EU/ISO and Japan. These conversions are helpful for shopping, but they should not be treated as mathematically exact matches because different systems use different step sizes.
If the international size is the information you know first, use our dedicated International to Indian Ring Size Converter Tool. It is designed for the opposite workflow: starting with an international size and returning an Indian size.
For standardisation background, you can also review the ISO 8653 jewellery ring-size standard information. When a retailer publishes its own chart, always compare your millimetre measurement with that chart before final checkout.
Use the size from a recent jeweller measurement, a well-fitting ring record, or a product that you know fits the intended finger. Avoid guessing from another finger unless you have no alternative.
The manual entry result gives both diameter and circumference. These are valuable when a website does not use Indian sizing but publishes a detailed product-size chart.
Use the US, UK, EU or Japan value as a quick bridge. If the seller’s chart maps the same size slightly differently, prioritise the physical measurement and contact the seller when the purchase is high value.
The PDF is useful as a portable size reference. It includes the selected Indian size, chart dimensions and international equivalents and is marked Generated by https://ringsizechart.online/.
A number such as 8 can mean very different physical sizes in different systems. Confirm that the number you enter is specifically an Indian size.
Finger size can change over time. A historical size is useful, but remeasure if the ring must fit precisely today.
The same person can wear different sizes on different fingers and hands. A known ring-finger size should not automatically be reused for the middle finger.
Some jewellers publish slightly different conversions. Cross-check diameter or circumference whenever available.
A broad band can feel tighter even when the opening matches the chart. Try wide designs physically when possible.
Use the tool as a reference, then confirm with the jeweller for engagement rings, platinum pieces and difficult-to-resize designs.
Have a finger circumference or ring diameter instead? Use the accurate online measurement calculator.
If you do not know your size, start with the instant size checker.
Browse the full measurements, comparisons and sizing guidance on our Indian ring size chart.