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Ring Size Guide

The finger size of all antique, period and modern rings available at our antique and bespoke jewellery shop in Central London are denoted alphabetically to the British standard. Should you require to compare ring sizes to European or American standards, please refer to the chart below.

Most rings can be resized without any sign of alteration. If you do not know your finger size please request for a finger gauge to be posted to you without charge by clicking here.

UK size US size Inside diameter (mm) Inside circumference (mm)
A ½ 12.04 37.8
B 1 12.45 39.1
C 12.85 40.4
D 2 13.26 41.7
E 13.67 42.9
F 3 14.07 44.2
G 14.48 45.5
H 4 14.88 46.8
I 15.29 48
J 15.49 48.7
K 15.9 50
L 16.31 51.2
M 16.71 52.5
N 17.12 53.8
O 17.53 55.1
P 17.93 56.3
Q 18.34 57.6
R 18.75 58.9
S 19.15 60.2
T 19.56 61.4
U 10¼ 19.96 62.7
V 10¾ 20.37 64
W 11¼ 20.78 65.3
X 11¾ 21.18 66.6
Y 12¾ 21.59 67.8
Z 12½ 21.79 68.5