What is my ring size?

You want to choose a ring in your size, but you can't try it on? You are not sure of your finger size, or of its equivalent in French size ?

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To calculate your finger size, measure the inside diameter of one of your rings that fits the finger where you want to wear your new ring.

Diamètre intérieur bague

Then refer to the following correspondence :

Diameter of the ring (mm) Ring size (Fr. & Germ.) Ring size (Swiss) Ring size (UK)

Ring size (US & Can.)

Ring size (Asia)
15,0 47 7 H 1/2 4 7
15,3 48 8 I 4.5 8
15,6 49 9 J 5 9
15,9 50 10 K 5 1/3 10
16,2 51 11 L 5 2/3 11
16,6 52 12 L 1/2 6 12
16,9 53 13 M 6 1/3 13
17,2 54 14 N 6 2/3 14
17,5 55 15 O 7 14.5
17,8 56 16 O 1/2 7.5 15
18,1 57 17 P 8 16
18,5 58 18 Q 8 1/3 17
18,8 59 19 R 8 2/3 18
19,1 60 20 S 9 18
19,4 61 21 S 1/2 9.5 19
19,7 62 22 T 10 20
20,0 63 23 U 10 1/3 21
20,4 64 24 V 10 2/3 22
20,7 65 25 W 11 23
21,0 66 26 X 11.5 24
21,4 67 27 Y 12 25
21,6 68 28 Z 12 1/3 26
22,0 69 29 Z 1/2 12 2/3 26.5
22,3 70 30 Z+1 13 27

Tip: if you hesitate between 2 sizes, always choose the upper ring size !

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