Ring Sizes Explained | International Ring Size Conversion Chart

Not sure of your ring size? Use our International Ring Size Conversion Chart.

You will find that most ring sizes on this site are quoted in the UK standard system of A-Z.

If you wish to find the equivalent size for your country, please use the conversion chart below.

Please note that the information on this page is intended as a general guide only. For an approximate measurement, simply measure across  the inside diameter of a ring that fits comfortably and compare with the table below. We would recommend that you check your ring size before ordering as there are many variations. We also recommend that you have your finger measured by a professional jeweler.

 

International Ring Size Conversion Chart

Inside Diameter Inside CircumferenceSizes
mmInchesmmInchesBritish & Australian US & CanadaFrench & RussianGermanJapaneseSwiss
9.910.39031.131.220000
10.720.44233.681.3900
11.530.45436.221.430
11.950.47437.541.49A1/2
12.180.48238.261.51A 1/23/4
12.370.48738.861.53B11
12.600.49639.581.56B 1/21 1/4
12.780.50340.151.58C1 1/2
13.000.51240.841.61C 1/21 3/4
13.210.52041.501.63D241 1/213 1/221 1/2
13.410.52842.131.66D 1/22 1/4
13.610.53642.761.68E2 1/242 3/413 3/432 3/4
13.830.54443.451.71E 1/22 3/4
14.050.55344.141.74F3441444
14.150.55744.451.75F 1/23 1/8
14.250.56144.771.76F 3/43 1/4
14.360.56545.111.77G3 3/845 1/455 1/4
14.450.56945.401.79G 1/43 1/214 1/2
14.560.57345.741.80G 1/23 5/86
14.650.57746.021.81H3 3/446 1/26 1/2
14.860.58546.681.84H 1/24157
15.040.59247.251.86I4 1/447 3/47 3/4
15.270.60147.971.89I 1/24 1/215 1/48
15.400.60648.381.90J4 5/84915 1/29
15.530.61148.791.92J 1/44 3/4
15.700.61849.321.94J 1/2515 3/49
15.800.62249.641.95K5 1/85010
15.900.62649.951.97K 1/45 1/4
16.000.63050.271.98K 1/25 3/810
16.100.63450.581.99L5 1/251 3/41611 3/4
16.300.64251.212.02L 1/45 3/4
16.410.64651.552.03L 1/25 7/8
16.510.65051.872.04M652 3/416 1/21212 3/4
16.710.65852.502.07M 1/26 1/4
16.920.66653.162.09N6 1/254171314
17.130.67453.822.12N 1/26 3/4
17.350.68354.512.15O755 1/417 1/41415 1/4
17.450.68754.822.16O 1/27 1/4
17.750.69955.762.20P7 1/256 1/217 3/41516 1/2
17.970.70756.452.22P 1/27 3/4
18.190.71657.152.25Q857 3/4181617 3/4
18.350.72257.652.27Q 1/28 1/4
18.530.72958.212.29Q 3/48 1/218 1/217
18.610.73358.472.30R8 5/85919
18.690.73658.722.31R 1/48 3/4
18.800.74059.062.32R 1/28 7/8
18.890.74859.342.35R 3/491918
19.100.75260.002.36S9 1/860 1/420 1/4
19.220.75760.382.38S 1/49 1/4
19.310.76060.662.39S 1/29 3/8
19.410.76460.982.40S 3/49 1/219 1/219
19.510.76861.292.41T9 5/861 1/221 1/2
19.620.77261.642.43T 1/49 3/4
19.840.78162.332.45T 1/2102020
20.020.78862.892.48U10 1/462 3/42122 3/4
20.200.79763.462.50U 1/210 1/220 1/422
20.320.80063.842.51V10 5/86323 3/4
20.440.80564.212.53V 1/410 3/4
20.680.81464.972.56V 1/21120 3/423
20.760.81765.222.57W11 1/86525
20.850.82165.502.58W 1/411 1/4
20.940.82465.782.59W 1/211 3/8
21.080.83066.222.61W 3/411 1/22124
21.180.83466.542.62X11 5/866 1/426 1/4
21.240.83666.732.63X 1/411 3/4
21.300.83966.922.64X 1/211 7/8
21.490.84667.512.66Y1267 1/221 1/42527 1/2
21.690.85468.142.68Y 1/212 1/4
21.890.86268.772.71Z12 1/268 3/421 3/42628 3/4
22.100.87069.432.73Z +1/212 3/4
22.330.87970.152.76Z+113692227
22.600.89071.002.80Z+1.513 1/2
22.690.89371.282.81Z+213 3/429
22.920.90272.002.83Z+2.5
23.060.90872.452.85Z+31431
23.240.91573.012.87Z+3.5
23.470.92473.732.90Z+414 1/232
23.550.92773.982.91Z+4.5
23.870.94074.992.95Z+51533
24.270.95676.253.00Z+615 1/2

 

I have been working in the fashion and jewellery industry since the mid 1970s when I started work in a seaside gift shop selling costume jewellery and fashion accessories. I started my own business in 1995 as the owner of Ringmania. I am currently working as a website designer at Talanda and updating a number of my current websites including ringmania.com, ringmania.co.uk and ringmania.ie
Please contact me if you have any questions about Ringmania or our products/services.

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