Ring Size Conversion Chart

Ring Size (US) Ring Size (UK) Ring Size (JP/CH) Finger Circumference (mm) Ring Diameter (mm)
4 H ½ 7 46.8 14.8
5 J ½ 9 49.3 15.6
6 L ½ 12 51.9 16.4
7 N ½ 14 54.4 17.2
8 P ½ 16 57.0 18.0
9 R ½ 18 59.5 18.9
10 T ½ 20 62.1 19.8
11 V ½ 23 64.6 20.6
12 Y 25 67.2 21.4