Ring Size Chart

Number Sizes Inside Inside Inside Inside
US/Canada Diameter Circumference Diameter Circumference
Standard (inches) (inches) (mm) (mm)
0 0.458 1.438 11.6 36.5
1/4 0.466 1.463 11.8 37.2
1/2 0.474 1.488 12.0 37.8
3/4 0.482 1.513 12.2 38.4
1 0.490 1.539 12.4 39.1
1 1/4 0.498 1.564 12.6 39.7
1 1/2 0.506 1.589 12.9 40.4
1 3/4 0.514 1.614 13.1 41.0
2 0.522 1.639 13.3 41.6
2 1/4 0.530 1.664 13.5 42.3
2 1/2 0.538 1.689 13.7 42.9
2 3/4 0.546 1.714 13.9 43.5
3 0.554 1.740 14.1 44.2
3 1/4 0.562 1.765 14.3 44.8
3 1/2 0.570 1.790 14.5 45.5
3 3/4 0.578 1.815 14.7 46.1
4 0.586 1.840 14.9 46.7
4 1/4 0.594 1.865 15.1 47.4
4 1/2 0.602 1.890 15.3 48.0
4 3/4 0.610 1.915 15.5 48.7
5 0.618 1.941 15.7 49.3
5 1/4 0.626 1.966 15.9 49.9
5 1/2 0.634 1.991 16.1 50.6
5 3/4 0.642 2.016 16.3 51.2
6 0.650 2.041 16.5 51.8
6 1/4 0.658 2.066 16.7 52.5
6 1/2 0.666 2.091 16.9 53.1
6 3/4 0.674 2.116 17.1 53.8
7 0.682 2.141 17.3 54.4
7 1/4 0.690 2.167 17.5 55.0
7 1/2 0.698 2.192 17.7 55.7
7 3/4 0.706 2.217 17.9 56.3
8 0.714 2.242 18.1 56.9
8 1/4 0.722 2.267 18.3 57.6
8 1/2 0.730 2.292 18.5 58.2
8 3/4 0.738 2.317 18.7 58.9
9 0.746 2.342 18.9 59.5
9 1/4 0.754 2.368 19.2 60.1
9 1/2 0.762 2.393 19.4 60.8
9 3/4 0.770 2.418 19.6 61.4
10 0.778 2.443 19.8 62.1
10 1/4 0.786 2.468 20.0 62.7
10 1/2 0.794 2.493 20.2 63.3
10 3/4 0.802 2.518 20.4 64.0
11 0.810 2.543 20.6 64.6
11 1/4 0.818 2.569 20.8 65.2
11 1/2 0.826 2.594 21.0 65.9
11 3/4 0.834 2.619 21.2 66.5
12 0.842 2.644 21.4 67.2
12 1/4 0.850 2.669 21.6 67.8
12 1/2 0.858 2.694 21.8 68.4
12 3/4 0.866 2.719 22.0 69.1
13 0.874 2.744 22.2 69.7
13 1/4 0.882 2.769 22.4 70.3
13 1/2 0.890 2.795 22.6 71.0
13 3/4 0.898 2.820 22.8 71.6
14 0.906 2.845 23.0 72.3
14 1/4 0.914 2.870 23.2 72.9
14 1/2 0.922 2.895 23.4 73.5
14 3/4 0.930 2.920 23.6 74.2
15 0.938 2.945 23.8 74.8
15 1/4 0.946 2.970 24.0 75.4
15 1/2 0.954 2.996 24.2 76.1
15 3/4 0.962 3.021 24.4 76.7
16 0.970 3.046 24.6 77.4