Ring Size Guide

UK EU US Diameter Circumference
J 49 4.75 15.72 49.39
J 1/2 49.6 5 15.92 50.01
K 50.2 5.2 16.12 50.63
K 1/2 50.8 5.5 16.31 51.25
L 51.5 5.7 16.51 51.87
L 1/2 52.1 6 16.71 52.50
M 52.7 6.2 16.91 53.12
M 1/2 53.3 6.4 17.11 53.74
N 53.9 6.7 17.30 54.36
N 1/2 54.5 6.9 17.50 54.99
O 55.2 7.2 17.70 55.61
O 1/2 55.8 7.4 17.90 56.23
P 56.4 7.6 18.10 56.85
P 1/2 57 7.9 18.29 57.47
Q 57.6 8.1 18.49 58.10
Q 1/2 58.2 8.4 18.69 58.72
R 58.8 8.6 18.89 59.34
R 1/2 59.5 8.8 19.09 59.96
S 60.1 9.1 19.28 60.59
S 1/2 60.7 9.3 19.48 61.21
T 61.3 9.6 19.68 61.83
T 1/2 61.9 9.8 19.88 62.45
U 62.5 10 20.08 63.07
U 1/2 63.1 10.3 20.28 63.70
V 63.8 10.5 20.47 64.32
V 1/2 64.4 10.8 20.67 64.94
W 65 11 20.87 65.56

 

The diameter and circumference are measured in millimeters.