Ring Sizes & Measuring Tools

What is Ring size?

'Ring size' is a measurement that refers to the inside circumference of a ring. It's important to know your correct ring size before buying a ring, otherwise it won't fit properly.

Different countries use different standardised systems for denoting ring size. Here is a chart with the 3 most common ring size systems, used in UK & Australia, USA and internationally.

Want to learn how to measure ring size? Continue reading below.

UK/AU Sizes EU Sizes USA Sizes
B 1
D 2
F 45 3
G 46
H 47 4
I 48
J 50 5
K 51
L 52 6
M 53
N 54 7
O 56
P 57 8
Q 58
R 59
S 61 9
T 62
U 63 10
V 64
W 66 11
X 67
Y 68 12
Z 69


Ring Size Tool Or Ring Size App?

1) Our Ring Size App

new ring sizer app 
Our free Ring Sizer App is accurate and easy to use!

Find out a ring size in UK, EU or USA measurements.
All sizes F - Z included, from smallest to largest finger.

Simply place your loved one's existing ring on your phone screen, then adjust the circle until it fits the inside of the ring exactly.

This app helps you keep an engagement ring or a special gift a surprise and saves you a trip to the jewellers.

download on the App Store Get it on Google Play

2) Or order your Free Ring Sizer