Ring Sizes

International Ring Size Chart

Ring Sizes (approx.)

Inside Diameter
UK US EU Inches MM
I 4.5 47 0.59 15.04
J 5 48.5 0.60 15.4
K 5.5 50 0.62 15.8
L 6 51 0.64 16.1
M 6.5 52 0.65 16.51
N 7 54 0.67 16.92
O 7.5 55 0.69 17.35
P 8 57 0.70 17.75
Q 8.5 58 0.72 18.19
R 9 58.5 0.73 18.61
S 9.5 59.5 0.75 19.1
T 10 61 0.77 19.51
U 10.25 62 0.78 20.02
V 10.5 63 0.8 20.32
W 11 65 0.82 20.76
X 11.5 66.25 0.83 21.18
Y 12 67.5 0.85 21.49
Z 12.5 68.5 0.86 21.89