About ring size



JP US UK France Germany Switzerland mm inches
#4 3 F 44 14 4 44 1.735
#5 3.5 G 45  1/4 14  1/2 5  1/4 45.2 1.79
#7 4 H 1/2 46  1/2 15 7  1/4 46.5 1.835
#8 4.5 I 1/2 47  3/4 15  1/4 8  3/4 47.8 1.89
#9 5 J 1/2 50 15  3/4 9  1/2 49 1.943
#11 5.5 L 51  3/4 16 11  3/4 50.3 2
#12 6 M 52  3/4 16  1/2 12  3/4 51.5 2.045
#13 6.5 N 54 17 14 52.8 2.1
#14 7 O 55  1/4 17  1/4 15  1/4 54 2.15
#15 7.5 P 56  1/2 17  3/4 16  1/2 55.3 2.2
#16 8 Q 57  3/4 18 17  3/4 56.6 2.25
#17 8.5 Q 1/2 58  1/2 18  1/2 18  1/2 57.8 2.3
#18 9 S 60 19 19  3/4 59.1 2.35
#19 9.5 T 61  1/2 19  1/2 21 60.3 2.4
#20 10 T 1/2 62  1/4 20 22 61.6 2.46
#22 10.5 U 1/2 63 20  1/4 23  1/4 62.8 2.51
#23 11 V 1/2 64  1/2 20  3/4 24 64.1 2.56
#24 11.5 X 66  1/4 21 25  3/4 65.3 2.61
#25 12 Y 67  1/2 21  1/4 27  1/2 66.6 2.63
#26 12.5 Z 68  3/4 21  3/4 28  3/4 67.9 2.71
#27 13 Z 1/2 70 22 29  1/4 69.1 2.76

example) Tell us "JP15" or "JP21.5".