Ring size chart — convert any size, any country.
The complete ring size conversion chart for every region. Look up US, UK, EU, Japanese, Indian, Chinese and continental European sizes side-by-side, with inner diameter and circumference in millimetres. Not sure of your size yet? Open the free virtual ring sizer first and we'll do the conversion for you.
| Inside Circumference | US / CA / MX🇺🇸 🇨🇦 🇲🇽 | UK / AU / IE / NZ / ZA🇬🇧 🇦🇺 🇮🇪 🇳🇿 🇿🇦 | France🇫🇷 | DE / RU / UA🇩🇪 🇷🇺 🇺🇦 | IN / CN / JP / SA / TR / IL🇮🇳 🇨🇳 🇯🇵 🇧🇷 🇨🇱 🇦🇷 🇹🇷 🇮🇱 | IT / ES / NL / CH🇮🇹 🇪🇸 🇳🇱 🇨🇭 | |
|---|---|---|---|---|---|---|---|
| IN | MM | ||||||
| 1.74 | 44.2 | 3 | F | 44 | 14 | 4 | 4 |
| 1.77 | 44.8 | 3.25 | F ½ | 44.625 | 14.25 | — | 4.625 |
| 1.79 | 45.5 | 3.5 | G | 45.25 | 14.5 | 5 | 5.25 |
| 1.82 | 46.1 | 3.75 | G ½ | 45.875 | 14.75 | 6 | 5.875 |
| 1.84 | 46.8 | 4 | H | 46.5 | 15 | 7 | 6.5 |
| 1.87 | 47.4 | 4.25 | H ½ | 47.125 | 15.25 | — | 7.125 |
| 1.89 | 48 | 4.5 | I | 47.75 | 15.5 | 8 | 7.75 |
| 1.92 | 48.7 | 4.75 | J | 48.375 | — | — | 8.375 |
| 1.94 | 49.3 | 5 | J ½ | 49 | 15.75 | 9 | 9 |
| 1.97 | 50 | 5.25 | K | 49.625 | 16 | — | 9.625 |
| 1.99 | 50.6 | 5.5 | K ½ | 50.25 | 16.25 | 10 | 10.25 |
| 2.02 | 51.2 | 5.75 | L | 50.875 | — | 11 | 10.875 |
| 2.04 | 51.9 | 6 | L ½ | 51.5 | 16.5 | 12 | 11.5 |
| 2.07 | 52.5 | 6.25 | M | 52.125 | 16.75 | — | 12.125 |
| 2.09 | 53.1 | 6.5 | M ½ | 52.75 | 17 | 13 | 12.75 |
| 2.12 | 53.8 | 6.75 | N | 53.375 | — | — | 13.375 |
| 2.14 | 54.4 | 7 | N ½ | 54 | 17.25 | 14 | 14 |
| 2.17 | 55.1 | 7.25 | O | 54.625 | 17.5 | — | 14.625 |
| 2.19 | 55.7 | 7.5 | O ½ | 55.25 | 17.75 | 15 | 15.25 |
| 2.22 | 56.3 | 7.75 | P | 55.875 | — | — | 15.875 |
| 2.24 | 57 | 8 | P ½ | 56.5 | 18 | 16 | 16.5 |
| 2.27 | 57.6 | 8.25 | Q | 57.125 | 18.25 | — | 17.125 |
| 2.29 | 58.3 | 8.5 | Q ½ | 57.75 | 18.5 | 17 | 17.75 |
| 2.32 | 58.9 | 8.75 | R | 58.375 | 18.75 | — | 18.375 |
| 2.34 | 59.5 | 9 | R ½ | 59 | 19 | 18 | 19 |
| 2.37 | 60.2 | 9.25 | S | 59.625 | 19.25 | — | 19.625 |
| 2.39 | 60.8 | 9.5 | S ½ | 60.25 | 19.5 | 19 | 20.25 |
| 2.42 | 61.4 | 9.75 | T | 60.875 | 19.75 | — | 20.875 |
| 2.44 | 62.1 | 10 | T ½ | 61.5 | 20 | 20 | 21.25 |
| 2.47 | 62.7 | 10.25 | U | 62.125 | 20.25 | 21 | 22.125 |
| 2.49 | 63.4 | 10.5 | U ½ | 62.75 | 20.5 | 22 | 22.75 |
| 2.52 | 64 | 10.75 | V | 63.375 | — | — | 23.375 |
| 2.54 | 64.6 | 11 | V ½ | 64 | 20.75 | 23 | 24 |
| 2.57 | 65.3 | 11.25 | W | 64.625 | — | — | 24.625 |
| 2.59 | 65.9 | 11.5 | W ½ | 65.25 | 21 | 24 | 25.25 |
| 2.62 | 66.6 | 11.75 | X | 65.875 | — | — | 25.875 |
| 2.65 | 67.2 | 12 | X ½ | 66.5 | 21.25 | 25 | 26.5 |
| 2.68 | 68.1 | 12.25 | Y | 67.125 | 21.5 | — | 27.125 |
| 2.71 | 68.5 | 12.5 | Z | 67.75 | 21.75 | 26 | 27.75 |
| 2.72 | 69.1 | 12.75 | Z ½ | 68.375 | — | — | 28.375 |
| 2.75 | 69.7 | 13 | — | 69 | 22 | 27 | 29 |
Diameter, circumference and what they mean.
Inside Diameter (IN / MM)
The straight-line distance across the inside of a ring. A US 8 ring has an inner diameter of about 18.14 mm (0.714 in). Jewellers most often measure with a ring mandrel that reads this directly.
Inside Circumference (MM)
The distance around the inside of a ring — what your finger actually measures. A US 8 has a circumference of about 57 mm. This is the metric most international standards (EU, JP) are based on.
US / Canada / Mexico (numeric)
North American sizes use whole and quarter-sizes from 3 through 13. Most women's rings fall between US 5 and 7, most men's between US 9 and 11.
UK / AU / IE / NZ / ZA (letter)
British and Commonwealth countries use a letter system from F to Z, often with ½ sizes (e.g. M½). One UK letter step ≈ ½ US size.
EU · France · Germany
Continental Europe usually uses the circumference in millimetres directly — so an EU 57 = 57 mm circumference = US 8.
Japan · China · India · South America
These regions use a numeric scale where 1 step ≈ 0.32 mm increase in circumference. A JP 16 ≈ US 8.
Use the free virtual ring sizer.
Place a ring you already own on the screen, or measure your finger with a paper strip — the ring size calculator does the conversion to every region automatically.
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