Christies Jewellery Online - Ring Size Conversions
Inside Diameter | Inside Diameter | Inside Circumference | Inside Circumference | Number Sizes | Letter Sizes |
0.570 | 14.5 | 1.790 | 45.5 | 3 1/2 | G |
0.578 | 14.7 | 1.815 | 46.1 | 3 3/4 | G 1/2 |
0.586 | 14.9 | 1.840 | 46.7 | 4 | H |
0.594 | 15.1 | 1.865 | 47.4 | 4 1/4 | H 1/2 |
0.602 | 15.3 | 1.890 | 48.0 | 4 1/2 | I |
0.610 | 15.5 | 1.915 | 48.7 | 4 3/4 | J |
0.618 | 15.7 | 1.941 | 49.3 | 5 | J 1/2 |
0.626 | 15.9 | 1.966 | 49.9 | 5 1/4 | K |
0.634 | 16.1 | 1.991 | 50.6 | 5 1/2 | K 1/2 |
0.642 | 16.3 | 2.016 | 51.2 | 5 3/4 | L |
0.650 | 16.5 | 2.041 | 51.8 | 6 | L 1/2 |
0.658 | 16.7 | 2.066 | 52.5 | 6 1/4 | M |
0.666 | 16.9 | 2.091 | 53.1 | 6 1/2 | M 1/2 |
0.674 | 17.1 | 2.116 | 53.8 | 6 3/4 | N |
0.682 | 17.3 | 2.141 | 54.4 | 7 | N 1/2 |
0.690 | 17.5 | 2.167 | 55.0 | 7 1/4 | O |
0.698 | 17.7 | 2.192 | 55.7 | 7 1/2 | O 1/2 |
0.706 | 17.9 | 2.217 | 56.3 | 7 3/4 | P |
0.714 | 18.1 | 2.242 | 56.9 | 8 | P 1/2 |
0.722 | 18.3 | 2.267 | 57.6 | 8 1/4 | Q |
0.730 | 18.5 | 2.292 | 58.2 | 8 1/2 | Q 1/2 |
0.738 | 18.7 | 2.317 | 58.9 | 8 3/4 | R |
0.746 | 18.9 | 2.342 | 59.5 | 9 | R 1/2 |
0.754 | 19.2 | 2.368 | 60.1 | 9 1/4 | S |
0.762 | 19.4 | 2.393 | 60.8 | 9 1/2 | S 1/2 |
0.770 | 19.6 | 2.418 | 61.4 | 9 3/4 | T |
0.778 | 19.8 | 2.443 | 62.1 | 10 | T 1/2 |
0.786 | 20.0 | 2.468 | 62.7 | 10 1/4 | U |
0.794 | 20.2 | 2.493 | 63.3 | 10 1/2 | U 1/2 |
0.802 | 20.4 | 2.518 | 64.0 | 10 3/4 | V |
0.810 | 20.6 | 2.543 | 64.6 | 11 | V 1/2 |
0.818 | 20.8 | 2.569 | 65.2 | 11 1/4 | W |
0.826 | 21.0 | 2.594 | 65.9 | 11 1/2 | W 1/2 |
0.834 | 21.2 | 2.619 | 66.5 | 11 3/4 | X |
0.842 | 21.4 | 2.644 | 67.2 | 12 | X 1/2 |
0.850 | 21.6 | 2.669 | 67.8 | 12 1/4 | Y |
0.858 | 21.8 | 2.694 | 68.4 | 12 1/2 | Z |
0.866 | 22.0 | 2.719 | 69.1 | 12 3/4 | Z 1/2 |
0.874 | 22.2 | 2.744 | 69.7 | 13 | |
0.882 | 22.4 | 2.769 | 70.3 | 13 1/4 | Z1 |
0.890 | 22.6 | 2.795 | 71.0 | 13 1/2 | |
0.898 | 22.8 | 2.820 | 71.6 | 13 3/4 | Z2 |
0.906 | 23.0 | 2.845 | 72.3 | 14 | Z3 |
0.914 | 23.2 | 2.870 | 72.9 | 14 1/4 | |
0.922 | 23.4 | 2.895 | 73.5 | 14 1/2 | Z4 |