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Ring Size Guide

Find your US ring size below, given in both millimetre and inch diameter.

US Size	Diameter	Inches
3	14.1 mm	0.55 in
4	14.9 mm	0.59 in
5	15.7 mm	0.62 in
6	16.5 mm	0.65 in
7	17.3 mm	0.68 in
8	18.1 mm	0.71 in
9	19.0 mm	0.75 in
10	19.8 mm	0.78 in
11	20.6 mm	0.81 in
12	21.4 mm	0.84 in

To measure at home, wrap a strip of paper or string around the base of your finger, mark where it overlaps, then measure that length against the diameter column above (circumference ÷ 3.14 ≈ diameter) to find your closest US size.