| Ring Size
A big ring of the width is tighter than a thin ring of the width and feels the size of the ring. |
| 10mm is about 0.4 inches.( 1 inche = 25.4mm ) |
| Outer of finger(mm) | Diameter of ring(mm) | Japanese Scale | U.S. Scale (approx.) |
European Scale | Australian Scale (approx.) |
| 40.8 | 13 | 1 | 1 | ||
| 41.9 | 13 1/3 | 3 | 2 1/2 | ||
| 44 | 14 | 4 | 3 | ||
| 45 | 14 1/3 | 5 | 3 1/2 | 45 | |
| 46.1 | 14 2/3 | 6 | 3 2/3 | 46 | |
| 47.1 | 15 | 7 | 4 1/3 | 47 | |
| 48.2 | 15 1/3 | 8 | 4 2/3 | 48 | |
| 49.2 | 15 2/3 | 9 | 5 | 49 | J+ |
| 50.3 | 16 | 10 | 5 1/2 | 50 | |
| 51.3 | 16 1/3 | 11 | 6 | 51 | -L |
| 52.4 | 16 2/3 | 12 | 6 1/2 | 52 | |
| 53.4 | 17 | 13 | 6 2/3 | 53 | M+ |
| 54.5 | 17 1/3 | 14 | 7 1/3 | 54 | |
| 55.5 | 17 2/3 | 15 | 7 2/3 | 55 | -O |
| 56.6 | 18 | 16 | 8 | 56 | |
| 57.6 | 18 1/3 | 17 | 8 1/2 | 57 | P+ |
| 58.6 | 18 2/3 | 18 | 9 | 58 | |
| 59.7 | 19 | 19 | 9 1/2 | 59 | -R |
| 60.7 | 19 1/3 | 20 | 10 | 60 | |
| 61.8 | 19 2/3 | 21 | 10 1/3 | 61 | S+ |
| 62.8 | 20 | 22 | 10 2/3 | 62 | |
| 63.9 | 20 1/3 | 23 | 11 | 63 | -U |
| 64.9 | 20 2/3 | 24 | 11 1/2 | 64 | |
| 66 | 21 | 25 | 12 | 65 | V+ |
| 66.9 | 21 1/3 | 26 | 12 1/2 | 66 | |
| 68 | 21 2/3 | 27 | 13 | 67 | -X |
