ring size conversion chart

Worldwide different kind of measurements and values are used for ring sizes. I use the French system on the website but you can use this chart to convert our size to your used method. When in doubt between 2 sizes pick the smaller one for a thin band ring and the biggest one for a wide band ring.
Don’t hesitate to send me an e-mail if you still can’t decide, I will gladly help you.

Diameter French Dutch Us Uk
14 44 14 3
14.3 45 14 1/4 3 1/2
14.6 46 14 1/2 3 3/4 G
15 47 15 4 H 1/2
15.3 48 15 1/2 4 1/2 I 1/2
15.6 49 15 3/4 4 3/4 J 1/2
15.9 50 16 5 1/4 K 1/2
16.2 51 16 1/4 5 3/4 L
16.6 52 16 1/2 6 M
16.9 53 16 3/4 6 1/2 N
17.2 54 17 1/4 7 O
17.5 55 17 1/2 7 1/4 P
17.8 56 17 3/4 7 3/4 P 1/2
18.1 57 18 8 Q
18.5 58 18 1/2 8 1/2 R
18.8 59 19 8 3/4 S 1/2
19.1 60 19 1/2 9 S
19.4 61 19 3/4 9 1/2 T
19.7 62 20 10 U
20 63 20 1/2 10 1/2 U 1/2
20.4 64 20 3/4 11 W 1/2
20.7 65 21 11 1/4 X
21.2 66 21 1/4 11 3/4 Y
21.3 67 21 1/2 12 Z
21.6 68 22 12 1/2 Z +