Ring Sizes

Please use our ring size conversion table as a guide only. For a more accurate conversion please call (01943) 601420 or visit Jeremy Bloomfield's.

All diameter (Ø) mm measurements are correct to one decimal place (1dp).


MM
Ø (MM)
UK
USA
48
15.3
I 1/2
4.5
49
15.7
J 1/2
5
51
16.1
L
5.5
52
16.5
M
6
53
16.9
N
6.5
55
17.4
O
7




MM
Ø (MM)
UK
USA
56
17.6
P
7.5
57
18.2
Q
8
58
18.5
Q 1/2
8.5
59
18.9
R 1/2
9
61
19.4
S 1/2
9.5
62
19.8
T 1/2
10




MM
Ø (MM)
UK
USA
63
20.2
U 1/2
10.5
65
20.7
V 1/2
11
66
21.1
W 1/2
11.5
68
21.5
Y
12
69
21.9
Z
12.5
70
22.3
n/a
13