Ring Size Guide

US Ring Size	Diameter (mm)	Circumference (mm)
3	14.1	44.2
3.5	14.5	45.5
4	14.9	46.8
4.5	15.3	48.0
5	15.7	49.3
5.5	16.1	50.6
6	16.5	51.9
6.5	16.9	53.1
7	17.3	54.4
7.5	17.7	55.7
8	18.1	57.0
8.5	18.5	58.3
9	18.9	59.5
9.5	19.4	60.8
10	19.8	62.1
10.5	20.2	63.4
11	20.6	64.6
11.5	21.0	65.9
12	21.4	67.2
13	22.2	69.7