How to find your Diamour Ring Size?

Circumference (mm)	Circumference (inches)	Ring size (mm)
41.01	1.61	1
42.7	1.64	2
42.9	1.69	3
43.6	1.72	4
44.8	1.76	5
46.1	1.81	6
47.4	1.87	7
48	1.89	8
48.7	1.92	9
50	1.97	10
51.2	2.02	11
51.9	2.04	12
53.1	2.09	13
54.4	2.14	14
55.1	2.16	15
56.3	2.22	16
57	2.24	17
58.3	2.3	18
58.9	2.32	19
60.2	2.37	20
60.8	2.39	21
62.1	2.44	22
62.7	2.47	23
64	2.52	24
64.6	2.54	25
65.9	2.59	26
67.2	2.65	27
67.8	2.67	28
69.1	2.72	29
71	2.8	30