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Jewelers follow a standard set of ring sizes! Measure at any jeweler or Walmart and enter the size on any rings page. Or, use one of the three options below to find your size!
Request a free sizer
Please note that the sizer is only available for mailing to customers in the United States.
Measure your size with an existing ring!
Calculate your size without a ring
Use string to measure circumference of your ring finger. Have a friend mark where the string forms full circle, and measure that distance against a ruler, and plug into the calculator below.
Measurement tips
Size chart
| Diameter (inches) | Diameter (mm) | US/Canada Standard | British, Irish, Australian, Equivalent | Japanese Equivalent | Swiss Equivalent |
|---|---|---|---|---|---|
| 0.458 | 11.6 | 0 | |||
| 0.466 | 11.8 | 0.25 | |||
| 0.474 | 12 | 0.50 | A | ||
| 0.482 | 12.2 | 0.75 | A 1/2 | ||
| 0.49 | 12.4 | 1 | B | 1 | |
| 0.498 | 12.6 | 1.25 | B 1/2 | ||
| 0.506 | 12.9 | 1 1/2 | C | ||
| 0.514 | 13.1 | 1 3/4 | C 1/2 | ||
| 0.522 | 13.3 | 2 | D | 2 | 1.5 |
| 0.53 | 13.5 | 2 1/4 | D 1/2 | ||
| 0.538 | 13.7 | 2 1/2 | E | 3 | 2.75 |
| 0.546 | 13.9 | 2 3/4 | E 1/2 | ||
| 0.554 | 14.1 | 3 | F | 4 | 4 |
| 0.562 | 14.3 | 3 1/4 | F 1/2 | 5 | 5.25 |
| 0.57 | 14.5 | 3 1/2 | G | ||
| 0.578 | 14.7 | 3 3/4 | G 1/2 | 6 | 6.5 |
| 0.586 | 14.9 | 4 | H | 7 | |
| 0.594 | 15.1 | 4 1/4 | H 1/2 | 7.75 | |
| 0.602 | 15.3 | 4 1/2 | I | 8 | |
| 0.61 | 15.5 | 4 3/4 | J | 9 | |
| 0.618 | 15.7 | 5 | J 1/2 | 9 | |
| 0.626 | 15.9 | 5 1/4 | K | 10 | |
| 0.634 | 16.1 | 5 1/2 | K 1/2 | 10 | |
| 0.642 | 16.3 | 5 3/4 | L | 11.75 | |
| 0.65 | 16.5 | 6 | L 1/2 | 11 | 12.75 |
| 0.658 | 16.7 | 6 1/4 | M | 12 | |
| 0.666 | 16.9 | 6 1/2 | M 1/2 | 13 | 14 |
| 0.674 | 17.1 | 6 3/4 | N | ||
| 0.682 | 17.3 | 7 | N 1/2 | 14 | 15.25 |
| 0.69 | 17.5 | 7 1/4 | O | ||
| 0.698 | 17.7 | 7 1/2 | O 1/2 | 15 | 16.5 |
| 0.706 | 17.9 | 7 3/4 | P | ||
| 0.714 | 18.1 | 8 | P 1/2 | 16 | 17.75 |
| 0.722 | 18.3 | 8 1/4 | Q | ||
| 0.73 | 18.5 | 8 1/2 | Q 1/2 | 17 | |
| 0.738 | 18.7 | 8 3/4 | R | 19 | |
| 0.746 | 18.9 | 9 | R 1/2 | 18 | |
| 0.754 | 19.2 | 9 1/4 | S | 20.25 | |
| 0.762 | 19.4 | 9 1/2 | S 1/2 | 19 | |
| 0.77 | 19.6 | 9 3/4 | T | 21.5 | |
| 0.778 | 19.8 | 10 | T 1/2 | 20 | |
| 0.786 | 20 | 10 1/4 | U | 21 | |
| 0.794 | 20.2 | 10 1/2 | U 1/2 | 22 | 22.75 |
| 0.802 | 20.4 | 10 3/4 | V | ||
| 0.81 | 20.6 | 11 | V 1/2 | 23 | |
| 0.818 | 20.8 | 11 1/4 | W | 25 | |
| 0.826 | 21 | 11 1/2 | W 1/2 | 24 | |
| 0.834 | 21.2 | 11 3/4 | X | ||
| 0.842 | 21.4 | 12 | X 1/2 | 25 | 27.5 |
| 0.85 | 21.6 | 12 1/4 | Y | ||
| 0.858 | 21.8 | 12 1/2 | Z | 26 | 28.75 |
| 0.866 | 22 | 12 3/4 | Z 1/2 | ||
| 0.874 | 22.2 | 13 | 27 | ||
| 0.882 | 22.4 | 13 1/4 | Z1 | ||
| 0.89 | 22.6 | 13 1/2 | |||
| 0.898 | 22.8 | 13 3/4 | Z2 | ||
| 0.906 | 23 | 14 | Z3 | ||
| 0.914 | 23.2 | 14 1/4 | |||
| 0.922 | 23.4 | 14 1/2 | Z4 | ||
| 0.93 | 23.6 | 14 3/4 | |||
| 0.938 | 23.8 | 15 | |||
| 0.946 | 24 | 15 1/4 | |||
| 0.954 | 24.2 | 15 1/2 | |||
| 0.962 | 24.4 | 15 3/4 | |||
| 0.97 | 24.6 | 16 | |||
| 0.978 | 24.8 | 16.25 | |||
| 0.986 | 25 | 16.5 | |||
| 0.994 | 25.2 | 16.75 | |||
| 1.002 | 25.4 | 17 | |||
| 1.01 | 25.6 | 17.25 | |||
| 1.018 | 25.8 | 17.5 | |||
| 1.026 | 26 | 17.75 | |||
| 1.034 | 26.2 | 18 | |||
| 1.042 | 26.4 | 18.25 | |||
| 1.05 | 26.6 | 18.5 | |||
| 1.058 | 26.8 | 18.75 | |||
| 1.066 | 27 | 19 | |||
| 1.074 | 27.2 | 19.25 | |||
| 1.082 | 27.4 | 19.5 | |||
| 1.09 | 27.6 | 19.75 | |||
| 1.098 | 27.8 | 20 | |||
| 1.106 | 28 | 20.25 | |||
| 1.114 | 28.2 | 20.5 | |||
| 1.122 | 28.4 | 20.75 | |||
| 1.13 | 28.6 | 21 |
