Ring Size Guide

Find your perfect ring size using our international conversion chart and interactive measurement tools. Sizes shown in US, UK, European, Japanese, and Australian systems.

International Ring Size Chart

Compare ring sizes across different international systems. Select your country's sizing system from the dropdown to highlight the relevant column.

Highlight sizing system:

Scroll horizontally to see all sizes →

US	UK	EU	Japan	AU/NZ	Diameter (mm)	Circumference (mm)
3	F	44.2	4	F	14.0	44.2
3.5	G	45.5	5	G	14.4	45.5
4	H	46.8	7	H	14.9	46.8
4.5	I	48.0	8	I	15.3	48.0
5	J	49.3	9	J	15.7	49.3
5.5	K	50.6	10	K	16.1	50.6
6	L	51.8	12	L	16.5	51.8
6.5	M	53.1	13	M	16.9	53.1
7	N	54.4	14	N	17.3	54.4
7.5	O	55.7	15	O	17.7	55.7
8	P	57.0	16	P	18.1	57.0
8.5	Q	58.3	17	Q	18.5	58.3
9	R	59.5	18	R	19.0	59.5
9.5	S	60.8	19	S	19.4	60.8
10	T	62.1	20	T	19.8	62.1
10.5	U	63.4	21	U	20.2	63.4
11	V	64.6	22	V	20.6	64.6
11.5	W	65.9	23	W	21.0	65.9
12	X	67.2	24	X	21.4	67.2
12.5	Y	68.5	25	Y	21.8	68.5
13	Z	69.7	26	Z	22.2	69.7
13.5	Z+1	71.0	27	Z+1	22.6	71.0
14	Z+2	72.3	28	Z+2	23.0	72.3

Measure Your Ring Size

Use one of the methods below to measure your finger, then enter your measurement to find your size in all international systems.

String Method

Cut a thin strip of paper or use a piece of non-stretchy string.
Wrap it around the base of the finger you want to size. Make sure it is snug but not too tight — you should be able to slide it over your knuckle.
Mark the point where the paper or string overlaps to form a complete circle.
Lay the paper or string flat and measure the length from the end to the mark in millimeters. This is your finger circumference.
Enter the measurement below to find your ring size in all international systems.

Tip: Measure at the end of the day when your fingers are at their largest. Avoid measuring when your hands are cold, as fingers shrink in cold temperatures.

Find Your Size

Enter your finger circumference (mm)