Your fingers should be measured when they are at room temperature. Please note that sizing may differ slightly depending on each design. For instance, wider bands may require a larger size. If you need further guidance, please do not hesitate to contact us. 

mm inside circumference Europe United Kingdom United States Asia
13.1 41 - 2
13.4 42 D 2.5 2
13.7 43 E - 3
14.0 44 F 3 4
14.3 45 G 3.5 5
14.7 46 H - 6
15.0 47 - 4 7
15.3 48 I 4.5 8
15.6 49 J 5 9
16.0 50 K 5.5 10
16.3 51 - - 11
16.6 52 L 6 12
17.0 53 M 6.5 13
17.2 54 N - 14
17.5 55 O 7 15
17.8 56 - 7.75 16
18.1 57 P 8 17
18.4 58 Q 8.5 18
18.8 59 R - 19
19.1 60 S 9 20
19.4 61 - 9.5 21
19.7 62 T 10 22
20.0 63 U 10.5 23
20.4 64 V - 24
20.7 65 W 11 25
21.0 66 X - 26
21.3 67 Y 12 27
21.7 68 - - 28
22.0 69 Z - 29
22.3 70 - 13 30
22.7 71 - - 31
23.0 72 - 14 32
23.3 73 - - 33
23.7 74 - - 34
24.0 75 - 15 35
24.3 76 - - 36