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International Ring Size: Conversion Chart

Some reputable jeweller's rings are specified in standard US sizes. View the conversion chart below to see how US sizes map to finger circumference, as well as how US sizes convert to Canada, Australia, Mexico, New Zealand, UK, Ireland, South Africa, France, Germany, Russia, Japan, India, China, Singapore, South America, Turkey, Italy, Spain, Netherlands & Switzerland ring sizes.

Check your ring size measurement with the international ring sizes chart below to determine your ring size. If your size seems to sit between two sizes displayed then you'll go with the higher of the two sizes:


Swipe left to see more.

Circumference USA, Canada & Mexico Australia, New Zealand, UK, Ireland & South Africa France Germany & Russia Japan, India, China, Singapore, South America & Turkey Italy, Spain, Netherlands & Switzerland
Inches MM
1.74 44 2 3 F 44 14 4 4
1.77 44.9 3.25 F-1/2 44.625 14.25 5 4.625
1.79 45.5 3.5 G 45.25 14.5 --- 5.25
1.82 46.1 3.75 G-1/2 45.875 14.75 6 5.875
1.84 46.8 4 H 46.5 15 7 6.5
1.87 47.4 4.25 H-1/2 47.125 15.25 --- 7.125
1.89 48 4.5 I 47.75 15.5 8 7.75
1.92 48.7 4.75 I-1/2 48.375 --- --- 8.375
1.94 49.3 5 J 49 15.75 9 9
1.97 50 5.25 J-1/2 49.625 16 --- 9.625
1.99 50.6 5.5 K 50.25 16.25 10 10.25
2.02 51.2 5.75 K-1/2 50.875 --- 11 10.875
2.04 51.9 6 L 51.5 16.5 12 11.5
2.07 52.5 6.25 L-1/2 52.125 16.75 --- 12.125
2.09 53.1 6.5 M 52.75 17 13 12.75
2.12 53.8 6.75 M-1/2 53.375 --- --- 13.375
2.14 54.7 7 N 54 17.25 14 14
2.17 55.1 7.25 N-1/2 54.625 17.5 --- 14.625
2.19 55.7 7.5 O 55.25 17.75 15 15.25
2.22 56.3 7.75 O-1/2 55.875 --- --- 15.875
2.24 57 8 P 56.5 18 16 16.5
2.27 57.6 8.25 P-1/2 57.125 18.25 --- 17.125
2.29 58.3 8.5 Q 57.75 18.5 17 17.75
2.32 58.9 8.75 Q-1/2 58.375 18.75 --- 18.375
2.34 59.5 9 R 59 19 18 19
2.37 60.2 9.25 R-1/2 59.625 19.25 --- 19.625
2.39 60.8 9.5 S 60.25 19.5 19 20.25
2.42 61.4 9.75 S-1/2 60.875 19.75 --- 20.875
2.44 62.1 10 T 61.5 20 20 21.5
2.47 62.7 10.25 T-1/2 62.125 20.25 21 22.125
2.49 63.4 10.5 U 62.75 20.5 22 22.75
2.52 64 10.75 U-1/2 63.375 --- --- 23.375
2.54 64.6 11 V 64 20.75 23 24
2.57 65.3 11.25 V-1/2 64.625 --- --- 24.625
2.59 65.9 11.5 W 65.25 21 24 25.25
2.62 66.6 11.75 W-1/2 65.875 --- --- 25.875
2.65 67.2 12 X 66.5 21.25 25 26.5
2.67 67.8 12.25 X-1/2 67.125 21.5 --- 27.125
2.70 68.5 12.5 Y 67.75 21.75 26 27.75
2.72 69.1 12.75 Z 68.375 --- --- 28.375
2.75 69.7 13 Z-1/2 69 22 27 29

International ring size - Conversion chart.