Ring Size I 2 J 3 K 2 K 1/2 2 L 6 L 1/2 6 M 4 M 1/2 11 N 2 N 1/2 3 O 3 O 1/2 5 P 1/2 1 Q 1 R 1 S 1/2 2 T 1/2 1 U 1/2 1 W 1/2 1 X 1 Z 1