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Ring Size Conversion Chart- from UK to US Sizes

UK SIZE	US SIZE	DIAMETER MM
A	0.5	11.5
B	1	12.3
C	1.5	12.7
D	2	13.1
E	2.5	13.5
F	3	13.9
G	3.25	14.3
H	3.75	14.7
I	4.25	15.1
J	4.75	15.5
K	5.25	15.9
L	5.75	16.3
M	6.25	16.7
N	6.75	17.1
O	7	17.5
P	7.5	17.9
Q	8	18.3
R	8.5	18.7
S	9	19.1
T	9.5	19.5
U	10	19.9
V	10.5	20.3
W	11	20.7
X	11.5	21.1
Y	12	21.5
Z	12.5	21.9

Ring Size Conversion Chart & Diameter of Ring

When buying a ring in a shop its is easy to try it on, but sometimes its much more convenient to buy online, if you know your ring size that is. When buying a ring online some times you can get caught out not knowing that the US have a different sizing system to the UK. Uk ring sizes are from A-Z but the US ring size are 0.5-12.5,also you can see the diameter of the ring compared to the sizes, so if your not sure you can measure a ring you already own to get the size of it,I hope Ring Size Conversion Chart shown above will help.