Ring and Finger Sizing

As a general rule the most popular ring sizes for women are between J and L.

After years of research the following guide can be used with some accuracy:

  • Dress size (8) - Finger size - Letter "I" or "J" but "J" would be an safer option. (Best option for small and petite fingers).
  • Dress size (10) - Finger size - Letter "K" or "L" but "L" would be an safer option. (Best option for someone who is taller).
  • Dress size (12) - Finger size - Letter "M" or "N" but "N" would be an safer option.

For men, P-V.

Download our handy guide.

The following are the standard dimensions used to calculate finger ring sizes.

Size Diameter (mm) Circumference (mm) Size Diameter (mm) Circumference (mm)
F 13.90mm 43.67mm R
18.70mm
58.75mm
G 14.30mm 46.18mm S
19.10mm
60.00mm
H 14.70mm 46.18mm T
19.50mm
61.62mm
I 15.10mm 47.44mm U
19.90mm
62.52mm
J 15.50mm 48.69mm V
20.30mm
63.77mm
K 15.90mm 49.95mm W
20.69mm
65mm
L
16.31mm
51.24mm
X
21.10mm
66.29mm
M
16.70mm
52.46mm
Y
21.49mm
67.51mm
N
17.10mm
53.72mm
Z
21.89mm
68.77mm
O
17.50mm
54.98mm
Z + 1
22.28mm
69.99mm
P
17.90mm
56.23mm
Z + 2
22.70mm
71.31mm
Q
18.30mm
57.49mm
Z + 3
23.10mm
72.57mm