RING SIZING GUIDE
USA/Canada Australia/UK Diameter (mm)
3 F 14
3.5 G 14.4
4 H 14.8
4.5 I 15.2
5 J 15.6
5.5 K 16
6 L 16.45
6.5 M 16.9
7 N 17.3
7.5 O 17.7
8 P 18.2
8.5 Q 18.6
9 R 19
9.5 S 19.4
10 T 19.8
10.5 U 20.2
11 V 20.6
11.5 W 21
12 X 21.4
12.5 Y 21.8
13 Z 22.2
 
To determine the diameter, measure across the inside circle of a ring that fits comfortably