Precision Sizing

Ring Size Guide & Conversion Chart

Find your perfect fit with our international sizing conversion chart and millimeter diameter measurement instructions.

Enter your finger circumference or inside ring diameter in millimeters (mm):

US Size	Indian Size	UK / Australia	Inside Diameter	Circumference
US 4	IN 7	H 1/2	14.9 mm	46.8 mm
US 5	IN 9	J 1/2	15.7 mm	49.3 mm
US 6	IN 11	L 1/2	16.5 mm	51.8 mm
US 7	IN 14	N 1/2	17.3 mm	54.4 mm
US 8	IN 16	P 1/2	18.1 mm	57.0 mm
US 9	IN 18	R 1/2	19.0 mm	59.5 mm
US 10	IN 21	T 1/2	19.8 mm	62.1 mm
US 11	IN 23	V 1/2	20.6 mm	64.6 mm
US 12	IN 25	X 1/2	21.4 mm	67.2 mm

Indian Size	US / Canada	UK / Aus	Inner Circumference	Inner Diameter
6	3.5	G	46.5 mm	14.8 mm
8	4.5	I	48.7 mm	15.5 mm
10	5.25	K	50.6 mm	16.1 mm
12	6.0	M	52.5 mm	16.7 mm
14	7.0	O	54.4 mm	17.3 mm
16	7.75	P 1/2	56.3 mm	17.9 mm
18	8.5	R	58.2 mm	18.5 mm
20	9.5	T	60.8 mm	19.3 mm
22	10.5	V	63.4 mm	20.2 mm
24	11.5	X	65.9 mm	21.0 mm