Ring Size Chart (existing ring)

Pick a ring that fits the desired finger well.

Measure the inner diameter of the ring.

Use the chart below to find your size.

UK Size Inside Diameter US Size
F 14.1 mm 3
G 14.5 mm 3.5
H 14.9 mm 4
I 15.3 mm 4.5
J 15.7 mm 5
K 16.1 mm 5.5
L 16.5 mm 6
M 16.9 mm 6.5
N 17.3 mm 7
O 17.7 mm 7.5
P 18.1 mm 8
Q 18.5 mm 8.5
R 18.9 mm 9
S 19.4 mm 9.5
T 19.8 mm 10
U 20.2 mm 10.5
V 20.6 mm 11
W 21.0 mm 11.5
X 21.4 mm 12
Y 21.8 mm 12.5

Wrap a strip of paper around your finger.

Mark where the paper overlaps and measure the length.

Use the circumference below to determine your size.