Ring Size Guide

The most accurate way of finding your size is to pop into our store and have your finger measured. We realise that this is not always convenient so we provide this guide to explain how you can measure your ring size as best we can!

Below is a chart that compares international sizes for rings. It also lists the measurements for inside diameter of rings in mm which you can use to measure an existing ring in a few easy steps.

size guide

International Ring Size Conversion Chart

Inside Diameter Inside CircumferenceSizes
MMInchesMMInchesBritish & Australian US & CanadaFrench & RussianGermanIndiaSwiss
9.910.39031.131.22-0000----
10.720.44233.681.39-00----
11.530.45436.221.43-0----
11.950.47437.541.49A1/2----
12.180.48238.261.51A 1/23/4----
12.370.48738.861.53B1--1-
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 1/4-55 1/4
14.450.56945.401.79G 1/43 1/2-14 1/2--
14.560.57345.741.80G 1/23 5/8--6-
14.650.57746.021.81H3 3/446 1/2--6 1/2
14.860.58546.681.84H 1/24-157-
15.040.59247.251.86I4 1/447 3/4--7 3/4
15.270.60147.971.89I 1/24 1/2-15 1/48-
15.400.60648.381.90J4 5/84915 1/2-9
15.530.61148.791.92J 1/44 3/4----
15.700.61849.321.94J 1/25-15 3/49-
15.800.62249.641.95K5 1/850--10
15.900.62649.951.97K 1/45 1/4----
16.000.63050.271.98K 1/25 3/8--10-
16.100.63450.581.99L5 1/251 3/416-11 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 1/2-18 1/217-
18.610.73358.472.30R8 5/859--19
18.690.73658.722.31R 1/48 3/4----
18.800.74059.062.32R 1/28 7/8----
18.890.74859.342.35R 3/49-1918-
19.100.75260.002.36S9 1/860 1/4--20 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 1/2-19 1/219-
19.510.76861.292.41T9 5/861 1/2--21 1/2
19.620.77261.642.43T 1/49 3/4----
19.840.78162.332.45T 1/210-2020-
20.020.78862.892.48U10 1/462 3/4-2122 3/4
20.200.79763.462.50U 1/210 1/2-20 1/422-
20.320.80063.842.51V10 5/863--23 3/4
20.440.80564.212.53V 1/410 3/4----
20.680.81464.972.56V 1/211-20 3/423-
20.760.81765.222.57W11 1/865--25
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 1/2-2124-
21.180.83466.542.62X11 5/866 1/4--26 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+113-2227-
22.600.89071.002.80Z+1.513.5----
22.690.89371.282.81Z+2-----
22.920.90272.002.83Z+2.5-----
23.060.90872.452.85Z+3-----
23.240.91573.012.87Z+3.5-----
23.470.92473.732.90Z+4-----
23.550.92773.982.91Z+4.5-----
23.870.94074.992.95Z+5-----
24.270.95676.253.00Z+6-----

Sizing tool

Don't have a ring you can measure against? In that case you can download our handy sizing tool. Simply Download and print it off below (At 100%). Cut out the tool and follow the instructions! Please note the tool gives you a size in a number which is the US size. This can then easily be converted to the UK size using the table above!

Download the sizing tool here!

You will need adobe acrobat reader to view & print this tool!