Aditya Jewellery
Find your perfect fit with our international conversion chart and simple measuring guidance.
1. Measure your finger
Wrap a narrow strip of paper or string around the base of your finger. Mark where it meets, then measure the length in millimetres. Keep it comfortably snug, never tight.
2. Measure an existing ring
Choose a ring that fits the intended finger. Measure the inside diameter straight across the centre, from inside edge to inside edge, in millimetres.
| US / Canada | UK / Australia | EU | India | Inside diameter (mm) | Inside circumference (mm) |
|---|---|---|---|---|---|
| 1 | A | 39.1 | 0 | 12.45 | 39.10 |
| 1.25 | A½ | 39.7 | 0.5 | 12.85 | 40.31 |
| 1.5 | B | 40.0 | 1 | 13.00 | 40.84 |
| 1.75 | B½ | 40.6 | 1.5 | 13.40 | 42.10 |
| 2 | C | 41.0 | 2 | 13.00 | 40.84 |
| 2.25 | C½ | 41.6 | 2.5 | 13.40 | 42.10 |
| 2.5 | D | 42.0 | 3 | 13.60 | 42.73 |
| 2.75 | D½ | 42.9 | 3.5 | 14.00 | 43.98 |
| 3 | E | 43.0 | 4 | 14.00 | 43.98 |
| 3.25 | E½ | 43.6 | 4.5 | 14.40 | 45.24 |
| 3.5 | F | 44.0 | 5 | 14.80 | 46.49 |
| 3.75 | F½ | 44.8 | 5.5 | 15.00 | 47.12 |
| 4 | G | 45.0 | 6 | 15.00 | 47.12 |
| 4.25 | G½ | 45.5 | 6.5 | 15.40 | 48.38 |
| 4.5 | H | 46.0 | 7 | 15.60 | 49.01 |
| 4.75 | H½ | 46.5 | 7.5 | 15.80 | 49.64 |
| 5 | I | 49.0 | 8 | 15.70 | 49.32 |
| 5.25 | I½ | 49.5 | 8.5 | 16.10 | 50.58 |
| 5.5 | J | 49.5 | 9 | 16.10 | 50.58 |
| 5.75 | J½ | 50.0 | 9.5 | 16.50 | 51.84 |
| 6 | L | 51.0 | 10 | 16.50 | 51.84 |
| 6.25 | L½ | 51.5 | 10.5 | 16.90 | 53.09 |
| 6.5 | M | 52.0 | 11 | 17.00 | 53.41 |
| 6.75 | M½ | 52.5 | 11.5 | 17.30 | 54.35 |
| 7 | N | 54.0 | 12 | 17.30 | 54.35 |
| 7.25 | N½ | 54.5 | 12.5 | 17.70 | 55.61 |
| 7.5 | O | 55.0 | 13 | 17.80 | 55.92 |
| 7.75 | O½ | 55.5 | 13.5 | 18.00 | 56.55 |
| 8 | P | 57.0 | 14 | 18.20 | 57.18 |
| 8.25 | P½ | 57.5 | 14.5 | 18.60 | 58.44 |
| 8.5 | Q | 58.0 | 15 | 18.60 | 58.44 |
| 8.75 | Q½ | 58.5 | 15.5 | 19.00 | 59.69 |
| 9 | R | 59.0 | 16 | 19.00 | 59.69 |
| 9.25 | R½ | 59.5 | 16.5 | 19.40 | 60.95 |
| 9.5 | S | 60.0 | 17 | 19.40 | 60.95 |
| 9.75 | S½ | 60.5 | 17.5 | 19.80 | 62.20 |
| 10 | T | 61.5 | 18 | 19.80 | 62.20 |
| 10.25 | T½ | 62.0 | 18.5 | 20.20 | 63.46 |
| 10.5 | U | 62.5 | 19 | 20.20 | 63.46 |
| 10.75 | U½ | 63.0 | 19.5 | 20.60 | 64.72 |
| 11 | V | 64.5 | 20 | 20.60 | 64.72 |
| 11.25 | V½ | 65.0 | 20.5 | 21.00 | 65.97 |
| 11.5 | W | 66.0 | 21 | 21.00 | 65.97 |
| 11.75 | W½ | 66.5 | 21.5 | 21.40 | 67.23 |
| 12 | X | 67.5 | 22 | 21.40 | 67.23 |
| 12.25 | X½ | 68.0 | 22.5 | 21.80 | 68.49 |
| 12.5 | Y | 68.5 | 23 | 21.80 | 68.49 |
| 12.75 | Y½ | 69.0 | 23.5 | 22.20 | 69.74 |
| 13 | Z | 69.5 | 24 | 22.20 | 69.74 |
| 13.25 | Z½ | 70.0 | 24.5 | 22.60 | 71.00 |
| 13.5 | Z+1 | 71.0 | 25 | 22.60 | 71.00 |
| 13.75 | Z+1½ | 71.5 | 25.5 | 23.00 | 72.26 |
| 14 | Z+2 | 72.0 | 26 | 23.00 | 72.26 |
| 14.25 | Z+2½ | 72.5 | 26.5 | 23.40 | 73.51 |
| 14.5 | Z+3 | 73.0 | 27 | 23.40 | 73.51 |
| 14.75 | Z+3½ | 73.5 | 27.5 | 23.80 | 74.77 |
| 15 | Z+4 | 74.0 | 28 | 23.80 | 74.77 |
| 15.25 | Z+4½ | 74.5 | 28.5 | 24.20 | 76.03 |
| 15.5 | Z+5 | 75.0 | 29 | 24.20 | 76.03 |
| 15.75 | Z+5½ | 75.5 | 29.5 | 24.60 | 77.28 |
| 16 | Z+6 | 76.0 | 30 | 24.60 | 77.28 |
Conversions are approximate because regional standards and quarter sizes can vary. Use diameter or circumference as the most precise reference.