Ring Sizing

At Coral Covey we use the UK Standard of ring sizing (where each size is represented by a letter, e.g. ‘M’). To order from us, you will need to know your ring size according to the UK Standard sizing. On the page below, we offer a conversion table if you know your ring size based on another standard.

If you don’t know your size or the ring size of your partner, we recommend getting in touch. There are two relatively simple methods of determining the size, and we can walk you through the process. Send us an email and we will be in touch soon.

Sizing conversion chart

If you have an existing ring size that requires conversion to the UK Standard, then please refer to this chart:

UK Size European
Size (Approx.)
American Size
(Approx.)
Inside
Diameter
Inches mm
G 0.5680 14.427
0.5758 14.625
46 0.5765 14.642
4 0.5820 14.783
H 0.5835 14.821
47 0.5890 14.961
0.5913 15.019
0.5980 15.189
I 0.5990 15.215
48 0.6015 15.279
0.6068 15.413
49 5 0.6141 15.597
J 0.6145 15.608
0.6223 15.806
50 0.6266 15.916
K 0.6300 16.002
0.6378 16.200
51 0.6391 16.234
L 6 0.6455 16.396
52 0.6517 16.552
0.6533 16.594
M 0.6610 16.789
0.6620 16.815
53 0.6642 16.871
0.6688 16.988
N 0.6765 17.183
54 0.6767 17.189
7 0.6780 17.221
0.6843 17.381
55 0.6893 17.507
O 0.6920 17.577
0.6940 17.628
0.6998 17.775
56 0.7018 17.826
P 0.7075 17.971
8 0.7100 18.034
57 0.7143 18.144
0.7153 18.169
Q 0.7230 18.364
0.7265 18.453
58 0.7269 18.462
0.7308 18.562
R 0.7385 18.758
59 0.7394 18.780
9 0.7430 18.872
0.7463 18.956
60 0.7519 19.098
S 0.7540 19.152
0.7590 19.279
0.7618 19.350
61 0.7644 19.416
T 0.7695 19.545
62 0.7770 19.736
0.7772 19.741
10 0.7780 19.761
U 0.7850 19.939
63 0.7895 20.054
0.7928 20.137
10½ 0.7940 20.168
V 0.8005 20.333
64 0.8020 20.372
0.8083 20.531
11 0.8110 20.599
65 0.8146 20.690
W 0.8160 20.726
0.8238 20.925
66 11½ 0.8271 21.008
X 0.8315 21.120
0.8393 21.318
67 0.8396 21.326
12 0.8430 21.412
Y 0.8470 21.514
68 0.8522 21.645
0.8548 21.712
12½ 0.8590 21.819
Z 0.8625 21.908
69 0.8647 21.963
0.8703 22.106
13 0.8750 22.225