Ring Finger Size
There are a variety of ring sizers, ring size charts and other tools to measure your ring size at home.
But the best way to determine your finger size is to visit at least one reputable jeweler.
How to Measure a Finger for Ring Size
Ring size chart sample
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Most jewelers will have the following finger sizing tools
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Often there are discrepancies in the sizing tools made by different manufacturers. If you want to place an online order to guarantee the sale price, you can do so, in the comment box clearly explain that you will call us back with the correct size, once determined by a jeweler. We will hold the order for a maximum of one week.
US/Canada |
Inner Diameter | Inner Diameter |
Inner |
Inner Circumference |
British, Irish, Australian sizes |
Japanese sizes |
Swiss sizes |
Standard | (inches) | (mm) | (inches) | (mm) | Equivalent | Equivalent | Equivalent |
0 | 0.458 | 11.6 | 1.438 | 36.5 | |||
1/4 | 0.466 | 11.8 | 1.463 | 37.2 | |||
1/2 | 0.474 | 12.0 | 1.488 | 37.8 | A | ||
3/4 | 0.482 | 12.2 | 1.513 | 38.4 | A 1/2 | ||
1 | 0.490 | 12.4 | 1.539 | 39.1 | B | 1 | |
1 1/4 | 0.498 | 12.6 | 1.564 | 39.7 | B 1/2 | ||
1 1/2 | 0.506 | 12.9 | 1.589 | 40.4 | C | ||
1 3/4 | 0.514 | 13.1 | 1.614 | 41.0 | C 1/2 | ||
2 | 0.522 | 13.3 | 1.639 | 41.6 | D | 2 | 1.50 |
2 1/4 | 0.530 | 13.5 | 1.664 | 42.3 | D 1/2 | ||
2 1/2 | 0.538 | 13.7 | 1.689 | 42.9 | E | 3 | 2.75 |
2 3/4 | 0.546 | 13.9 | 1.714 | 43.5 | E 1/2 | ||
3 | 0.554 | 14.1 | 1.740 | 44.2 | F | 4 | 4.00 |
3 1/4 | 0.562 | 14.3 | 1.765 | 44.8 | F 1/2 | 5 | 5.25 |
3 1/2 | 0.570 | 14.5 | 1.790 | 45.5 | G | ||
3 3/4 | 0.578 | 14.7 | 1.815 | 46.1 | G 1/2 | 6 | 6.50 |
4 | 0.586 | 14.9 | 1.840 | 46.7 | H | 7 | |
4 1/4 | 0.594 | 15.1 | 1.865 | 47.4 | H 1/2 | 7.75 | |
4 1/2 | 0.602 | 15.3 | 1.890 | 48.0 | I | 8 | |
4 3/4 | 0.610 | 15.5 | 1.915 | 48.7 | J | 9.00 | |
5 | 0.618 | 15.7 | 1.941 | 49.3 | J 1/2 | 9 | |
5 1/4 | 0.626 | 15.9 | 1.966 | 49.9 | K | 10.00 | |
5 1/2 | 0.634 | 16.1 | 1.991 | 50.6 | K 1/2 | 10 | |
5 3/4 | 0.642 | 16.3 | 2.016 | 51.2 | L | 11.75 | |
6 | 0.650 | 16.5 | 2.041 | 51.8 | L 1/2 | 11 | 12.75 |
6 1/4 | 0.658 | 16.7 | 2.066 | 52.5 | M | 12 | |
6 1/2 | 0.666 | 16.9 | 2.091 | 53.1 | M 1/2 | 13 | 14.00 |
6 3/4 | 0.674 | 17.1 | 2.116 | 53.8 | N | ||
7 | 0.682 | 17.3 | 2.141 | 54.4 | N 1/2 | 14 | 15.25 |
7 1/4 | 0.690 | 17.5 | 2.167 | 55.0 | O | ||
7 1/2 | 0.698 | 17.7 | 2.192 | 55.7 | O 1/2 | 15 | 16.50 |
7 3/4 | 0.706 | 17.9 | 2.217 | 56.3 | P | ||
8 | 0.714 | 18.1 | 2.242 | 56.9 | P 1/2 | 16 | 17.75 |
8 1/4 | 0.722 | 18.3 | 2.267 | 57.6 | Q | ||
8 1/2 | 0.730 | 18.5 | 2.292 | 58.2 | Q 1/2 | 17 | |
8 3/4 | 0.738 | 18.7 | 2.317 | 58.9 | R | 19 | |
9 | 0.746 | 18.9 | 2.342 | 59.5 | R 1/2 | 18 | |
9 1/4 | 0.754 | 19.2 | 2.368 | 60.1 | S | 20.25 | |
9 1/2 | 0.762 | 19.4 | 2.393 | 60.8 | S 1/2 | 19 | |
9 3/4 | 0.770 | 19.6 | 2.418 | 61.4 | T | 21.5 | |
10 | 0.778 | 19.8 | 2.443 | 62.1 | T 1/2 | 20 | |
10 1/4 | 0.786 | 20.0 | 2.468 | 62.7 | U | 21 | |
10 1/2 | 0.794 | 20.2 | 2.493 | 63.3 | U 1/2 | 22 | 22.75 |
10 3/4 | 0.802 | 20.4 | 2.518 | 64.0 | V | ||
11 | 0.810 | 20.6 | 2.543 | 64.6 | V 1/2 | 23 | |
11 1/4 | 0.818 | 20.8 | 2.569 | 65.2 | W | 25 | |
11 1/2 | 0.826 | 21.0 | 2.594 | 65.9 | W 1/2 | 24 | |
11 3/4 | 0.834 | 21.2 | 2.619 | 66.5 | X | ||
12 | 0.842 | 21.4 | 2.644 | 67.2 | X 1/2 | 25 | 27.50 |
12 1/4 | 0.850 | 21.6 | 2.669 | 67.8 | Y | ||
12 1/2 | 0.858 | 21.8 | 2.694 | 68.4 | Z | 26 | 28.75 |
12 3/4 | 0.866 | 22.0 | 2.719 | 69.1 | Z 1/2 | ||
13 | 0.874 | 22.2 | 2.744 | 69.7 | 27 | ||
13 1/4 | 0.882 | 22.4 | 2.769 | 70.3 | Z1 | ||
13 1/2 | 0.890 | 22.6 | 2.795 | 71.0 | |||
13 3/4 | 0.898 | 22.8 | 2.820 | 71.6 | Z2 | ||
14 | 0.906 | 23.0 | 2.845 | 72.3 | Z3 | ||
14 1/4 | 0.914 | 23.2 | 2.870 | 72.9 | |||
14 1/2 | 0.922 | 23.4 | 2.895 | 73.5 | Z4 | ||
14 3/4 | 0.930 | 23.6 | 2.920 | 74.2 | |||
15 | 0.938 | 23.8 | 2.945 | 74.8 | |||
15 1/4 | 0.946 | 24.0 | 2.970 | 75.4 | |||
15 1/2 | 0.954 | 24.2 | 2.996 | 76.1 | |||
15 3/4 | 0.962 | 24.4 | 3.021 | 76.7 | |||
16 | 0.970 | 24.6 | 3.046 | 77.4 |