Determine your ring size

The chart below shows the different sizes and how they compare. All you have to worry about is how many mm the circumference of the ring needs to be to fit around your finger. We can take care of the rest!
As you can see, a size ‘6’ ring in the US matches a size ‘L’ ring in the UK. If you already own a perfectly fitting ring and know its size, just forward that information!

USA EuropeInner Circumference in mmUK
37.3A
139.1B
1.50.1540.4C
21.540.4D
2.52.7642.9E
34.1444.2F
3.55.4045.5G
46.6846.8H
4.57.7948.0I
59.3249.3J
5.510.550.6K
611.8151.9L
6.513.153.1M
714.51 54.4 N
7.515.7655.7O
817.157.0P
8.518.458.3Q
919.659.5R
9.520.960.8S
9.520.9860.8T
1022.3362.1U
10.523.563.4V
1124.9764.6W
11.526.2265.9X
1227.5167.2Y
12.528.7768.5Z
1330.1569.7Z+1
13.531.4771.0Z+2
1432.672.3Z+3