1. Check the size of your existing ring

Print the ring size guide and follow instructions to find out what size your existing ring is:

Ring Size Guide - click to print

2. Size Conversion Chart

Inside Diameter
Inches MM UK US EU
0.52 12.84 D 2.25 41
0.53 13.57 E 2.75 42
0.55 13.97 F 3.25 44
0.56 14.38 G 3.75 45
0.58 14.88 H 4.25 46.5
0.59 15.10 I 4.5 47
0.60 15.49 J 5 48.5
0.62 15.90 K 5.5 50
0.64 16.31 L 6 51
0.65 16.71 M 6.5 52
0.67 17.12 N 6.75 53.5
0.69 17.53 O 7 55
0.70 17.93 P 7.5 56
0.72 18.34 Q 8 57
0.73 18.75 R 8.5 58.5
0.75 19.15 S 9 59.5
0.77 19.56 T 9.5 61
0.78 19.81 U 10 62.5
0.79 20.17 V 10.5 63
0.81 20.61 W 11 65
0.83 20.99 X 11.5 66
0.84 21.32 Y 12 67.5
0.85 21.71 Z 12.5 69
0.87 22.10 Z+1 13 70.5