International Ring Size Conversion Chart

Ring size
        US          UK Inside  Inside Inside Inside Japan  India
Diameter Diameter Circumf. Circumf.
Inches mm Inches mm (Europe)
3 F 0.554 14.07 1.74 44.2 4
3+1⁄4 F+1⁄2 0.562 14.27 1.77 44.8 5 5
3+1⁄2 G 0.57 14.48 1.79 45.5
3+3⁄4 G+1⁄2 0.578 14.68 1.82 46.1 6 6
4 H 0.586 14.88 1.84 46.8 7
4+1⁄4 H+1⁄2 0.594 15.09 1.87 47.4 7
4+1⁄2 I 0.602 15.29 1.89 48 8 8
4+3⁄4 J 0.61 15.49 1.92 48.7 9
5 J+1⁄2 0.618 15.7 1.94 49.3 9
5+1⁄4 K 0.626 15.9 1.97 50 10
5+1⁄2 K+1⁄2 0.634 16.1 1.99 50.6 10
5+3⁄4 L 0.642 16.31 2.02 51.2 11
6 L+1⁄2 0.65 16.51 2.04 51.9 11 12
6+1⁄4 M 0.658 16.71 2.07 52.5 12
6+1⁄2 M+1⁄2 0.666 16.92 2.09 53.1 13 13
6+3⁄4 N 0.674 17.12 2.12 53.8
7 N+1⁄2 0.682 17.32 2.14 54.4 14 14
7+1⁄4 O 0.69 17.53 2.17 55.1 15
7+1⁄2 O+1⁄2 0.698 17.73 2.19 55.7 15
7+3⁄4 P 0.706 17.93 2.22 56.3 16
8 P+1⁄2 0.714 18.14 2.24 57 16 17
8+1⁄4 P+3⁄4 0.722 18.34 2.27 57.6
8+1⁄2 Q+1⁄4 0.73 18.54 2.29 58.3 17 18
8+3⁄4 R 0.738 18.75 2.32 58.9 19
9 R+1⁄2 0.746 18.95 2.34 59.5 18
9+1⁄4 S 0.754 19.15 2.37 60.2 20
9+1⁄2 S+1⁄2 0.762 19.35 2.39 60.8 19 21
9+3⁄4 T 0.77 19.56 2.42 61.4
10 T+1⁄2 0.778 19.76 2.44 62.1 20 22
10+1⁄4 U 0.786 19.96 2.47 62.7 21 23
10+1⁄2 U+1⁄2 0.794 20.17 2.49 63.4 22
10+3⁄4 V 0.802 20.37 2.52 64 24
11 V+1⁄2 0.81 20.57 2.54 64.6 23 25
11+1⁄4 W 0.818 20.78 2.57 65.3
11+1⁄2 W+1⁄2 0.826 20.98 2.59 65.9 24 26
11+3⁄4 X 0.834 21.18 2.62 66.6
12 X+1⁄2 0.842 21.39 2.65 67.2 25 27
12+1⁄4 Y 0.85 21.59 2.67 67.8 28
12+1⁄2 Y+1⁄2 0.858 21.79 2.7 68.5 26
12+3⁄4 Z 0.866 22 2.72 69.1 29
13 Z+1⁄2 0.874 22.2 2.75 69.7 27 30
13+1⁄4 Z1 0.882 22.4 2.77 70.4
13+1⁄2 0.89 22.61 2.8 71 31
13+3⁄4 Z2 0.898 22.81 2.82 71.7 32
14 Z3 0.906 23.01 2.85 72.3
14+1⁄4 0.914 23.22 2.87 72.9 33
14+1⁄2 Z4 0.922 23.42 2.9 73.6
14+3⁄4 0.93 23.62 2.92 74.2 34

 

Disclaimer: Please understand that this conversion tool and chart is provided as-is without any guarantees. Its purpose is to give you a general idea of your ring size. This should not be considered an official recommendation from Starborn Inc., and we are not liable if the ring size you choose does not fit. There are many variables to consider, including subjective opinions of fit, fluctuations in finger size throughout the day (your finger size can indeed differ between morning and night), and the availability of half sizes but not quarter sizes, among others. Therefore, we cannot account for every possible factor.