Chart

1. Use a peice of string or paper.
2. Mark the point where the two ends overlap and measure that length.
3. Use the chart below to figure out your ring size.

UK Size	Inside Diameter
	Inches	mm
G	0.5680	14.427
G½	0.5758	14.625
H	0.5835	14.821
H½	0.5913	15.019
I	0.5990	15.215
I½	0.6068	15.413
J	0.6145	15.608
J½	0.6223	15.806
K	0.6300	16.002
K½	0.6378	16.200
L	0.6455	16.396
L½	0.6533	16.594
M	0.6610	16.789
M½	0.6688	16.988
N	0.6765	17.183
N½	0.6843	17.381
O	0.6920	17.577
O½	0.6998	17.775
P	0.7075	17.971
P½	0.7153	18.169
Q	0.7230	18.364
Q½	0.7308	18.562
R	0.7385	18.758
R½	0.7463	18.956
S	0.7540	19.152
S½	0.7618	19.350
T	0.7695	19.545
T½	0.7772	19.741
U	0.7850	19.939
U½	0.7928	20.137
V	0.8005	20.333
V½	0.8083	20.531
W	0.8160	20.726
W½	0.8238	20.925
X	0.8315	21.120
X½	0.8393	21.318
Y	0.8470	21.514
Y½	0.8548	21.712
Z	0.8625	21.908
Z½	0.8703	22.106