Ring Size Chart: How to Measure Ring Size

How do you find out your ring size? We’ve put up this comprehensive ring size guide to assist you in determining your ring size. It contains how to measure, a ring size chart, and questions you may have when measuring the ring size at home.

How to Measure Your Ring Size?

Take a string or strip of paper and wrap it around the base of the desired finger.
Mark the point where the end meets the string or paper with a pen.
Measure the string or paper on a ruler in millimeters to the point where you marked it.
Pick the closest measurement on the ring size chart to find your ring size.

Ring Size Cm to Inches

Enter In Length in Metres to get the output in Feet, Inches and Centimetres.

cm.

in.

International Ring Size Conversion Chart

Each country has a standard unit of measure to illustrate your ring size. However, placing an order for your ring can get a little confusing. Therefore we have created the table below for you to see your size and the equivalent depending on the country.

Inside Diameter (inches)	Inside Diameter (mm)	Inside Circumference (inches)	Inside Circumference (mm)	USA & Canada	British, Irish, Australian & New Zealand	European
0.458	11.6	1.438	36.5
0.466	11.8	1.463	37.2
0.474	12	1.488	37.8		A
0.482	12.2	1.513	38.4		A 1/2
0.49	12.4	1.539	39.1	1	B
0.498	12.6	1.564	39.7	1 1/4	B 1/2
0.506	12.9	1.589	40.4	1 1/2	C
0.514	13.1	1.614	41	1 3/4	C 1/2
0.522	13.3	1.639	41.6	2	D	1.5
0.53	13.5	1.664	42.3	2 1/4	D 1/2
0.538	13.7	1.689	42.9	2 1/2	E	2.75
0.546	13.9	1.714	43.5	2 3/4	E 1/2
0.554	14.1	1.74	44.2	3	F	4
0.562	14.3	1.765	44.8	3 1/4	F 1/2	5.25
0.57	14.5	1.79	45.5	3 1/2	G
0.578	14.7	1.815	46.1	3 3/4	G 1/2	6.5
0.586	14.9	1.84	46.7	4	H
0.594	15.1	1.865	47.4	4 1/4	H 1/2	7.75
0.602	15.3	1.89	48	4 1/2	I
0.61	15.5	1.915	48.7	4 3/4	J	9
0.618	15.7	1.941	49.3	5	J 1/2
0.626	15.9	1.966	49.9	5 1/4	K	10
0.634	16.1	1.991	50.6	5 1/2	K 1/2
0.642	16.3	2.016	51.2	5 3/4	L	11.75
0.65	16.5	2.041	51.8	6	L 1/2	12.75
0.658	16.7	2.066	52.5	6 1/4	M	12.75
0.666	16.9	2.091	53.1	6 1/2	M 1/2	14
0.674	17.1	2.116	53.8	6 3/4	N
0.682	17.3	2.141	54.4	7	N 1/2	15.25
0.69	17.5	2.167	55	7 1/4	O
0.698	17.7	2.192	55.7	7 1/2	O 1/2	16.5
0.706	17.9	2.217	56.3	7 3/4	P
0.714	18.1	2.242	56.9	8	P 1/2	17.75
0.722	18.3	2.267	57.6	8 1/4	Q
0.73	18.5	2.292	58.2	8 1/2	Q 1/2
0.738	18.7	2.317	58.9	8 3/4	R	19
0.746	18.9	2.342	59.5	9	R 1/2
0.754	19.2	2.368	60.1	9 1/4	S	20.25
0.762	19.4	2.393	60.8	9 1/2	S 1/2
0.77	19.6	2.418	61.4	9 3/4	T	21.5
0.778	19.8	2.443	62.1	10	T 1/2
0.786	20	2.468	62.7	10 1/4	U
0.794	20.2	2.493	63.3	10 1/2	U 1/2	22.75
0.802	20.4	2.518	64	10.3/4	V
0.81	20.6	2.543	64.6	11	V 1/2
0.818	20.8	2.569	65.2	11 1/4	W	25
0.826	21	2.594	65.9	11 1/2	W 1/2
0.834	21.2	2.619	66.5	11 3/4	X
0.842	21.4	2.644	67.2	12	X 1/2	27.5
0.85	21.6	2.669	67.8	12 1/4	Y
0.858	21.8	2.694	68.4	12 1/2	Z	28.75
0.866	22	2.719	69.1	12 3/4	Z 1/2
0.874	22.2	2.744	69.7	13
0.882	22.4	2.769	70.3	13 1/4	Z1
0.89	22.6	2.795	71	13 1/2
0.898	22.8	2.82	71.6	13 3/4	Z2
0.906	23	2.845	72.3	14	Z3
0.914	23.2	2.87	72.9	14 1/4
0.922	23.4	2.895	73.5	14 1/2	Z4
0.93	23.6	2.92	74.2	14 3/4
0.938	23.8	2.945	74.8	15
0.946	24	2.97	75.4	15 1/4
0.954	24.2	2.996	76.1	15 1/2
0.962	24.4	3.021	76.7	15 3/4
0.97	24.6	3.046	77.4	16

Measuring Ring Size Tips from Jewelers

Avoid measuring for a ring when you’re cold because your fingers will be half a size smaller. Your stronger hand will almost always be slightly bigger. Make a point of measuring each finger separately.
If your knuckle is larger than your finger base, measure both and choose a size in between.
When using a string or piece of paper to measure your finger, don’t let it get too loose, and don’t pull it too tight. Doing either will change the size of your ring.
For best results, measure 3 or 4 times and compare the results. Make certain that the sizing is correct.
If you already have a ring that fits, measure the inside diameter and use that to determine your ring size.

FAQs about How to Measure Ring Size

How do you find out your ring size?

Find your ring size in several ways:

Printable ring sizer: Download and print a ring sizer from a jewelry website to measure your finger. Wrap the paper sizer around your finger and read the size.

String or paper: Measure your finger. Wrap a string or strip of paper around your finger, record the overlap, then measure the length with a ruler. Measure and use a ring size chart to find your size.

Online ring sizer: To accurately estimate your finger size, follow the website instructions.
Visit a jewelry store.

What size ring is 6 cm?

A ring with an internal diameter of 6 cm equates to a US size of 9 1/2.

Is size 7 ring normal?

Yes, a ring size of 7 is a pretty common size for both women’s rings and men’s pinky rings.

What is 7 cm in a ring size?

A ring with an internal diameter of 7 cm equates to a US size of 13 1/4.

How big is a size 10 ring?

A size 10 ring typically has an inner diameter of approximately 19.8 mm or 0.778 inches.

How big is a size 11 ring?

A size 11 ring typically has an inner diameter of approximately 20.6 mm or 0.81 inches.

How big is a size 8 ring?

A size 8 ring typically has an inner diameter of approximately 18.1 mm or 0.714 inches.

How big is a size 5 ring?

A size 5 ring typically has an inner diameter of approximately 15.7 mm or 0.62 inches.

How big is a size 9 ring?

A size 9 ring typically has an inner diameter of approximately 18.9 mm or 0.746 inches.

How big is a size 4 ring?

A size 4 ring typically has an inner diameter of approximately 14.9 mm or 0.586 inches.

How big is a size 4.5 ring?

A size 4.5 ring typically has an inner diameter of approximately 15.3 mm or 0.602 inches.

How big is a size 5.5 ring?

A size 5.5 ring typically has an inner diameter of approximately 16.1 mm or 0.634 inches.