Ring size guide, international ring size chart

I use a US standard guideline when sizing rings as default.

Since the rings in my store are made to order, taking into account the size of the client - to determine the size of the ring to order, you can use the international ring size chart bellow:

 Ring size chart

 
Inside Diameter Inside Circumference Sizes
MM Inches MM Inches British & Australian US & Canada French German Swiss
16.51 0.650 51.87 02.04 M 6 52 3/4 16 1/2 12 3/4
16.71 0.658 52.50 02.07 M 1/2 6 1/4 - - -
16.92 0.666 53.16 02.09 N 6 1/2 54 17 14
17.13 0.674 53.82 2.12 N 1/2 6 3/4 - - -
17.35 0.683 54.51 2.15 O 7 55 1/4 17 1/4 15 1/4
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 56 1/2 17 3/4 16 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 57 3/4 18 17 3/4
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 1/2 -
18.61 0.733 58.47 2.30 R 8 5/8 59 - 19
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 -
19.10 0.752 60.00 2.36 S 9 1/8 60 1/4 - 20 1/4
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 1/2 -
19.51 0.768 61.29 2.41 T 9 5/8 61 1/2 - 21 1/2
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 -
20.02 0.788 62.89 2.48 U 10 1/4 62 3/4 - 22 3/4
20.20 0.797 63.46 2.50 U 1/2 10 1/2 - 20 1/4 -
20.32 0.800 63.84 2.51 V 10 5/8 63 - 23 3/4
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 3/4 -
20.76 0.817 65.22 2.57 W 11 1/8 65 - 25
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 -
21.18 0.834 66.54 2.62 X 11 5/8 66 1/4 - 26 1/4
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 67 1/2 21 1/4 27 1/2
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 68 3/4 21 3/4 28 3/4
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 71 22 -
22.60 0.890 71.00 2.80 Z+1.5 13 1/4 - - -
22.69 0.893 71.28 2.81 Z+2 13 1/2 72 1/4 22 1/2 -
22.92 0.902 72.00 2.83 Z+2.5 13 3/4 - - -
23.06 0.908 72.45 2.85 Z+3 14 - 23 -

You can determine the size of the ring yourself using tips from the Internet. But I highly recommend trying on your ring finger size at your local jewelry store for greater accuracy.