Jewellery
Ring Blank Calculator | Ring Sizing Table
Ring Blank Length
Volume Approximation
Mass Approximation
| ISO Circumference (mm) | Diameter (mm) | UK, Ireland, Australia, South Africa, New Zealand | US | East Asia ( China, Japan, South Korea), South America | India |
|---|---|---|---|---|---|
| 36.50 | 11.62 | 0.00 | |||
| 37.14 | 11.82 | 0.25 | |||
| 37.50 | 11.94 | A | |||
| 37.78 | 12.02 | 0.50 | |||
| 38.13 | 12.14 | A 1/2 | |||
| 38.41 | 12.23 | 0.75 | |||
| 38.75 | 12.33 | B | |||
| 39.05 | 12.43 | 1.00 | |||
| 39.38 | 12.53 | B 1/2 | |||
| 39.69 | 12.63 | 1.25 | |||
| 40.00 | 12.73 | C | |||
| 40.33 | 12.84 | 1.50 | |||
| 40.63 | 12.93 | C 1/2 | 1 | ||
| 40.96 | 13.04 | 1.75 | |||
| 41.25 | 13.13 | D | 1 | ||
| 41.60 | 13.24 | 2.00 | |||
| 41.88 | 13.33 | D 1/2 | 2 | 2 | |
| 42.24 | 13.44 | 2.25 | |||
| 42.50 | 13.53 | E | |||
| 42.88 | 13.65 | 2.50 | |||
| 43.13 | 13.73 | E 1/2 | 3 | 3 | |
| 43.51 | 13.85 | 2.75 | |||
| 43.75 | 13.93 | F | 4 | 4 | |
| 44.15 | 14.05 | 3.00 | |||
| 44.38 | 14.13 | F 1/2 | |||
| 44.79 | 14.26 | 3.25 | |||
| 45.00 | 14.32 | G | 5 | 5 | |
| 45.43 | 14.46 | 3.50 | |||
| 45.63 | 14.52 | G 1/2 | |||
| 46.06 | 14.66 | 3.75 | |||
| 46.25 | 14.72 | H | 6 | 6 | |
| 46.70 | 14.87 | 4.00 | |||
| 46.88 | 14.92 | H 1/2 | 7 | ||
| 47.34 | 15.07 | 4.25 | |||
| 47.50 | 15.12 | I | 7 | ||
| 47.98 | 15.27 | 4.50 | |||
| 48.13 | 15.32 | I 1/2 | 8 | 8 | |
| 48.61 | 15.47 | 4.75 | |||
| 48.75 | 15.52 | J | 9 | 9 | |
| 49.25 | 15.68 | 5.00 | |||
| 49.38 | 15.72 | J 1/2 | |||
| 49.89 | 15.88 | 5.25 | |||
| 50.00 | 15.92 | K | 10 | 10 | |
| 50.53 | 16.08 | 5.50 | |||
| 50.63 | 16.11 | K 1/2 | |||
| 51.16 | 16.29 | 5.75 | |||
| 51.25 | 16.31 | L | 11 | 11 | |
| 51.80 | 16.49 | 6.00 | |||
| 51.88 | 16.51 | L 1/2 | 12 | ||
| 52.44 | 16.69 | 6.25 | |||
| 52.50 | 16.71 | M | 12 | ||
| 53.08 | 16.89 | 6.50 | |||
| 53.13 | 16.91 | M 1/2 | 13 | 13 | |
| 53.71 | 17.10 | 6.75 | |||
| 53.75 | 17.11 | N | |||
| 54.35 | 17.30 | 7.00 | |||
| 54.38 | 17.31 | N 1/2 | 14 | 14 | |
| 54.99 | 17.50 | 7.25 | |||
| 55.00 | 17.51 | O | 15 | ||
| 55.63 | 17.71 | O 1/2 | 15 | ||
| 55.63 | 17.71 | 7.50 | |||
| 56.25 | 17.90 | P | 16 | ||
| 56.26 | 17.91 | 7.75 | |||
| 56.88 | 18.10 | P 1/2 | 16 | 17 | |
| 56.90 | 18.11 | 8.00 | |||
| 57.50 | 18.30 | Q | |||
| 57.54 | 18.31 | 8.25 | |||
| 58.13 | 18.50 | Q 1/2 | 17 | 18 | |
| 58.18 | 18.52 | 8.50 | |||
| 58.75 | 18.70 | R | 18 | 19 | |
| 58.81 | 18.72 | 8.75 | |||
| 59.38 | 18.90 | R 1/2 | |||
| 59.45 | 18.92 | 9.00 | |||
| 60.00 | 19.10 | S | 19 | 20 | |
| 60.09 | 19.13 | 9.25 | |||
| 60.63 | 19.30 | S 1/2 | 20 | 21 | |
| 60.73 | 19.33 | 9.50 | |||
| 61.25 | 19.50 | T | |||
| 61.36 | 19.53 | 9.75 | |||
| 61.88 | 19.70 | T 1/2 | 21 | 22 | |
| 62.00 | 19.74 | 10.00 | |||
| 62.50 | 19.89 | U | 22 | ||
| 62.64 | 19.94 | 10.25 | |||
| 63.13 | 20.09 | U 1/2 | 23 | ||
| 63.28 | 20.14 | 10.50 | |||
| 63.75 | 20.29 | V | 23 | ||
| 63.91 | 20.34 | 10.75 | |||
| 64.38 | 20.49 | V 1/2 | 24 | ||
| 64.55 | 20.55 | 11.00 | |||
| 65.00 | 20.69 | W | 24 | 25 | |
| 65.19 | 20.75 | 11.25 | |||
| 65.63 | 20.89 | W 1/2 | 26 | ||
| 65.83 | 20.95 | 11.50 | |||
| 66.25 | 21.09 | X | 25 | 27 | |
| 66.46 | 21.16 | 11.75 | |||
| 66.88 | 21.29 | X 1/2 | 26 | ||
| 67.10 | 21.36 | 12.00 | |||
| 67.50 | 21.49 | Y | 28 | ||
| 67.74 | 21.56 | 12.25 | |||
| 68.13 | 21.68 | Y 1/2 | 27 | ||
| 68.38 | 21.76 | 12.50 | |||
| 68.75 | 21.88 | Z | |||
| 69.01 | 21.97 | 12.75 | |||
| 69.38 | 22.08 | Z 1/2 | 29 | ||
| 69.65 | 22.17 | 13.00 | |||
| 70.00 | 22.28 | Z1 | 30 | ||
| 70.29 | 22.37 | 13.25 | |||
| 70.63 | 22.48 | Z1 1/2 | |||
| 70.93 | 22.58 | 13.50 | |||
| 71.25 | 22.68 | Z2 | |||
| 71.56 | 22.78 | 13.75 | |||
| 71.88 | 22.88 | Z2 1/2 | |||
| 72.20 | 22.98 | 14.00 | |||
| 72.50 | 23.08 | Z3 | |||
| 72.84 | 23.18 | 14.25 | |||
| 73.13 | 23.28 | Z3 1/2 | |||
| 73.48 | 23.39 | 14.50 | |||
| 73.75 | 23.48 | Z4 | |||
| 74.11 | 23.59 | 14.75 | |||
| 74.38 | 23.67 | Z4 1/2 | |||
| 74.75 | 23.79 | 15.00 | |||
| 75.00 | 23.87 | Z5 | |||
| 75.39 | 24.00 | 15.25 | |||
| 75.63 | 24.07 | Z5 1/2 | |||
| 76.03 | 24.20 | 15.50 | |||
| 76.25 | 24.27 | Z6 | |||
| 76.66 | 24.40 | 15.75 | |||
| 77.30 | 24.61 | 16.00 |