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Ring Sizing Guide

Ring Sizing Guide

When buying rings it is important to buy the right size to ensure a comfortable fit. It does not help that ring sizes are measured differently in different countries. If you already know your ring size in another system, then we have included a helpful conversion chart below.

If you do not know your ring size (or that of the person you are buying it for), then there are two easy methods to work it out:

Take a ring you already own that fits comfortably, print off our ring sizing chart and compare your ring to the circles on the chart. You should print onto A4 paper and make sure that it is printed at 100% scale
Wrap a piece of thread (or paper, but this may be slightly less accurate) once around the finger you want to wear the ring on, mark out the length required and then measure it with a ruler. You can then look up this measurement, which is the inner circumference, on our conversion chart below. You may want to allow 1-2 extra millimetres to allow for the thickness of the ring

International Ring Sizing Table

UK ring size	Inner circumference in mm	US ring size	European ring size	Inner diameter in mm
I	48 mm	4 ½	48	15 ¾ mm
J	49 mm	5	49	15 ½ mm
K	50 mm	5 ½	50	16 mm
L	51 mm	6	51	16 ¼ mm
M	52 mm	6 ½	52	16 ½ mm
N	54 mm	7	54	17 mm
O	55 mm	7 ½	55	17 ½ mm
P	56 mm	8	56	18 mm
Q	57 mm	8 ½	57	18 ¼ mm
R	59 mm	9	59	18 ¾ mm
S	60 mm	9 ½	60	19 mm
Please note that measurements in this table are approximate – but realistically it is very difficult to measure more accurately than 1mm without special equipment.