Ring Size Conversion Chart

Ring Size Conversion Chart

 Diameter(mm) US & Canada Europe UK & Australia Japan & Singapore
14.10 3 44 F 1/2 4
14.30 3.25 45 G 5
14.50 3.5 G 1/2
14.70 3.75 46 H 6
14.90 4 47 H 1/2 7
15.10 4.25 I
15.30 4.5 48 I 1/2 8
15.50 4.75 J
15.70 5 49 J 1/2 9
15.90 5.25 50 K
16.10 5.5 K 1/2 10
16.30 5.75 51 L
16.50 6 52 L 1/2 11
16.70 6.25 M 12
16.90 6.5 53 M 1/2 13
17.10 6.75 N
17.30 7 54 N 1/2 14
17.50 7.25 55 O
17.70 7.5 O 1/2 15
17.90 7.75 56 P
18.10 8 57 P 1/2 16
18.30 8.25 Q
18.50 8.5 58 Q 1/2 17
18.80 8.75 59 R
19.00 9 R 1/2 18
19.20 9.25 60 S
19.40 9.5 61 S 1/2 19
19.60 9.75 T
19.80 10 62 T 1/2 20
20.00 10.25 U 21
20.20 10.5 63 U 1/2 22
20.40 10.75 64 V
20.60 11 V 1/2 23
20.80 11.25 65 W
21.00 11.5 66 W 1/2 24
21.20 11.75 X
21.40 12 67 X 1/2 25
21.60 12.25 Y
21.80 12.5 68 Z 26
22.00 12.75 69 Z 1/2
22.20 13 70 27
22.40 13.25 Z+1
22.60 13.5 Z+2