Ring Size Chart

Circumference (mm)	Inner Diameter (mm)	US Size	Korea Size
52	15.0 - 15.3	3.5	5
53	15.5 - 15.7	4	6
54	15.8 - 16.0	4.25	7
55	16.0 - 16.2	4.75	8
56	16.3 - 16.5	5	9
57	16.5 - 16.8	5.5	10
58	17.0 - 17.2	6	11
59	17.4 - 17.6	6.25	12
60	17.8 - 18.0	6.5	13
61	18.0 - 18.2	7	14
62	18.2 - 18.4	7.5	15
63	18.5 - 18.8	8	16
64	19.0 - 19.2	8.25	17
65	19.3 - 19.5	8.75	18
66	20	9	19
67	21	9.5	20

If you are unsure of your ring size, please see our Ring Size Guide here.