Inside Diameter Inside Circumference Sizes
mm Inches mm Inches British & Australian US & Canada
14.36 0.565 45.11 1.77 G 3 3/8
14.45 0.569 45.40 1.79 G 1/4 3 1/2
14.56 0.573 45.74 1.80 G 1/2 3 5/8
14.65 0.577 46.02 1.81 H 3 3/4
14.86 0.585 46.68 1.84 H 1/2 4
15.04 0.592 47.25 1.86 I 4 1/4
15.27 0.601 47.97 1.89 I 1/2 4 1/2
15.40 0.606 48.38 1.90 J 4 5/8
15.53 0.611 48.79 1.92 J 1/4 4 3/4
15.70 0.618 49.32 1.94 J 1/2 5
15.80 0.622 49.64 1.95 K 5 1/8
15.90 0.626 49.95 1.97 K 1/4 5 1/4
16.00 0.630 50.27 1.98 K 1/2 5 3/8
16.10 0.634 50.58 1.99 L 5 1/2
16.30 0.642 51.21 2.02 L 1/4 5 3/4
16.41 0.646 51.55 2.03 L 1/2 5 7/8
16.51 0.650 51.87 2.04 M 6
16.71 0.658 52.50 2.07 M 1/2 6 1/4
16.92 0.666 53.16 2.09 N 6 1/2
17.13 0.674 53.82 2.12 N 1/2 6 3/4
17.35 0.683 54.51 2.15 O 7
17.45 0.687 54.82 2.16 O 1/2 7 1/4
17.75 0.699 55.76 2.20 P 7 1/2
17.97 0.707 56.45 2.22 P 1/2 7 3/4
18.19 0.716 57.15 2.25 Q 8
18.35 0.722 57.65 2.27 Q 1/2 8 1/4
18.53 0.729 58.21 2.29 Q 3/4 8 1/2
18.61 0.733 58.47 2.30 R 8 5/8
18.69 0.736 58.72 2.31 R 1/4 8 3/4
18.80 0.740 59.06 2.32 R 1/2 8 7/8
18.89 0.748 59.34 2.35 R 3/4 9
19.10 0.752 60.00 2.36 S 9 1/8
19.22 0.757 60.38 2.38 S 1/4 9 1/4
19.31 0.760 60.66 2.39 S 1/2 9 3/8
19.41 0.764 60.98 2.40 S 3/4 9 1/2
19.51 0.768 61.29 2.41 T 9 5/8
19.62 0.772 61.64 2.43 T 1/4 9 3/4
19.84 0.781 62.33 2.45 T 1/2 10
20.02 0.788 62.89 2.48 U 10 1/4
20.20 0.797 63.46 2.50 U 1/2 10 1/2
20.32 0.800 63.84 2.51 V 10 5/8
20.44 0.805 64.21 2.53 V 1/4 10 3/4
20.68 0.814 64.97 2.56 V 1/2 11
20.76 0.817 65.22 2.57 W 11 1/8
20.85 0.821 65.50 2.58 W 1/4 11 1/4
20.94 0.824 65.78 2.59 W 1/2 11 3/8
21.08 0.830 66.22 2.61 W 3/4 11 1/2
21.18 0.834 66.54 2.62 X 11 5/8
21.24 0.836 66.73 2.63 X 1/4 11 3/4
21.30 0.839 66.92 2.64 X 1/2 11 7/8
21.49 0.846 67.51 2.66 Y 12
21.69 0.854 68.14 2.68 Y 1/2 12 1/4
21.89 0.862 68.77 2.71 Z 12 1/2
22.10 0.870 69.43 2.73 Z +1/2 12 3/4
22.33 0.879 70.15 2.76 Z+1 13
22.60 0.890 71.00 2.80 Z+1.5 13.5

 

This chart is a guide only. Please visit our showroom to have your finger professionally sized.