Ring Size Guide

To obtain the most accurate measurement of your finger, measure at room temperature, when your hands are not unusually cold.

Alternatively, to work out your size from an existing ring, measure the ring using our sizing guide below.

  DIAMETER

 CIRCUMFERENCE

                                                       

MM

MM

UK

US 

 JP  

 SWISS 

15.3 48 I 4.5 8
15.5 48.7 J 4.75 9
15.9 49.9 K 5.25 10
16.3 51.2 L 5.75 11.75
16.7 52.5 M 6.25 12
17.1 53.8 N 6.75
17.5 55 O 7.25
17.9 56.3 P 7.75
18.3 57.6 Q 8.25
18.7 58.9 R 8.75 19
19.2 60.1 S 9.25 20.25
19.6 61.4 T 9.75 21.5
20 62.7 U 10.25 21
20.4 64 V 10.75
20.8 65.2 W 11.25 25
21.2 66.5 X 11.75
21.6 67.8 Y 12.25
21.8 68.4 Z 12.5