Ring Sizes Conversion Chart
Ring sizes listed should only be used as a guide as each ring size can vary depending on a wearer's finger conditions.
There are several systems in use for denoting the sizes of jewellery rings around the world, it is best that a fitting or a special ring sizer used to find a comfortable fit.
Metric ring sizes are measured from their inner diameter or inner circumferences.
France ring sizes and German ring measurements are based on the diameter and circumference measurements, while other countries listed below have their own systems.
(diameter) inch |
(diam) mm |
(circumf) inch |
(circumf) mm |
US, CAN | UK, AUS | CHN, JPN | SWZ |
---|---|---|---|---|---|---|---|
0.390 | 9.91 | 1.22 | 31.1 | 000 | |||
0.422 | 10.72 | 1.32 | 33.7 | 00 | |||
0.459 | 11.63 | 1.44 | 36.5 | 0 | |||
0.466 | 11.84 | 1.46 | 37.2 | ¼ | |||
0.474 | 12.04 | 1.49 | 37.8 | ½ | A | ||
0.482 | 12.24 | 1.51 | 38.5 | ¾ | A½ | ||
0.49 | 12.45 | 1.54 | 39.1 | 1 | B | 1 | |
0.498 | 12.65 | 1.56 | 39.7 | 1¼ | B½ | ||
0.506 | 12.85 | 1.59 | 40.4 | 1½ | C | ||
0.514 | 13.06 | 1.61 | 41.0 | 1¾ | C½ | ||
0.522 | 13.26 | 1.64 | 41.7 | 2 | D | 2 | 1.5 |
0.53 | 13.46 | 1.67 | 42.3 | 2¼ | D½ | ||
0.538 | 13.67 | 1.69 | 42.9 | 2½ | E | 3 | 2.75 |
0.546 | 13.87 | 1.72 | 43.6 | 2¾ | E½ | ||
0.554 | 14.07 | 1.74 | 44.2 | 3 | F | 4 | 4 |
0.562 | 14.27 | 1.77 | 44.8 | 3¼ | F½ | 5 | 5.25 |
0.57 | 14.48 | 1.79 | 45.5 | 3½ | G | ||
0.578 | 14.68 | 1.82 | 46.1 | 3¾ | G½ | 6 | 6.5 |
0.586 | 14.88 | 1.84 | 46.8 | 4 | H | 7 | |
0.594 | 15.09 | 1.87 | 47.4 | 4¼ | H½ | 7.75 | |
0.602 | 15.29 | 1.89 | 48.0 | 4½ | I | 8 | |
0.606 | 15.4 | 1.90 | 48.26 | I½ | |||
0.61 | 15.49 | 1.92 | 48.7 | 4¾ | J | 9 | |
0.618 | 15.70 | 1.94 | 49.3 | 5 | J½ | 9 | |
0.626 | 15.90 | 1.97 | 50.0 | 5¼ | K | 10 | |
0.634 | 16.10 | 1.99 | 50.6 | 5½ | K½ | 10 | |
0.642 | 16.31 | 2.02 | 51.2 | 5¾ | L | 11.75 | |
0.65 | 16.51 | 2.04 | 51.9 | 6 | L½ | 11 | 12.75 |
0.658 | 16.71 | 2.07 | 52.5 | 6¼ | M | 12 | |
0.666 | 16.92 | 2.09 | 53.1 | 6½ | M½ | 13 | 14 |
0.674 | 17.12 | 2.12 | 53.8 | 6¾ | N | ||
0.682 | 17.32 | 2.14 | 54.4 | 7 | N½ | 14 | 15.25 |
0.69 | 17.53 | 2.17 | 55.1 | 7¼ | O | ||
0.698 | 17.73 | 2.19 | 55.7 | 7½ | O½ | 15 | 16.5 |
inch (d) | mm (d) | inch (c) | mm (c) | US, CAN | UK, AUS | CHN, JPN | SWZ |
0.706 | 17.93 | 2.22 | 56.3 | 7¾ | P | ||
0.714 | 18.14 | 2.24 | 57.0 | 8 | P½ | 16 | 17.75 |
0.722 | 18.34 | 2.27 | 57.6 | 8¼ | Q | ||
0.73 | 18.54 | 2.29 | 58.3 | 8½ | Q½ | 17 | |
0.738 | 18.75 | 2.32 | 58.9 | 8¾ | R | 19 | |
0.746 | 18.95 | 2.34 | 59.5 | 9 | R½ | 18 | |
0.754 | 19.15 | 2.37 | 60.2 | 9¼ | S | 20.25 | |
0.762 | 19.35 | 2.39 | 60.8 | 9½ | S½ | 19 | |
0.77 | 19.56 | 2.42 | 61.4 | 9¾ | T | 21.5 | |
0.778 | 19.76 | 2.44 | 62.1 | 10 | T½ | 20 | |
0.786 | 19.96 | 2.47 | 62.7 | 10¼ | U | 21 | |
0.794 | 20.17 | 2.49 | 63.4 | 10½ | U½ | 22 | 22.75 |
0.802 | 20.37 | 2.52 | 64.0 | 10¾ | V | ||
0.81 | 20.57 | 2.54 | 64.6 | 11 | V½ | 23 | |
0.818 | 20.78 | 2.57 | 65.3 | 11¼ | W | 25 | |
0.826 | 20.98 | 2.59 | 65.9 | 11½ | W½ | 24 | |
0.834 | 21.18 | 2.62 | 66.6 | 11¾ | X | ||
0.842 | 21.39 | 2.65 | 67.2 | 12 | X½ | 25 | 27.5 |
0.85 | 21.59 | 2.67 | 67.8 | 12¼ | Y | ||
0.858 | 21.79 | 2.70 | 68.5 | 12½ | Z | 26 | 28.75 |
0.866 | 22.00 | 2.72 | 69.1 | 12¾ | Z½ | ||
0.874 | 22.20 | 2.75 | 69.7 | 13 | 27 | ||
0.882 | 22.40 | 2.77 | 70.4 | 13¼ | Z1 | ||
0.89 | 22.61 | 2.80 | 71.0 | 13½ | |||
0.898 | 22.81 | 2.82 | 71.7 | 13¾ | Z2 | ||
0.906 | 23.01 | 2.85 | 72.3 | 14 | Z3 | ||
0.914 | 23.22 | 2.87 | 72.9 | 14¼ | |||
0.922 | 23.42 | 2.90 | 73.6 | 14½ | Z4 | ||
0.93 | 23.62 | 2.92 | 74.2 | 14¾ | |||
0.938 | 23.83 | 2.95 | 74.8 | 15 | |||
0.946 | 24.03 | 2.97 | 75.5 | 15¼ | |||
0.954 | 24.23 | 3.00 | 76.1 | 15½ | |||
0.962 | 24.43 | 3.02 | 76.8 | 15¾ | |||
0.97 | 24.64 | 3.05 | 77.4 | 16 |