Ring Size

Ring Size Calculator

By Nicholas A ColomboNov 5, 2023

This ring size chart is the be all end all when it comes to figuring out your ring size. I dare say it's the ultimate conversion chart. It is not however going to measure your finger for you.

If you looking for how to measure your ring size, I have another guide for that. Finding your ring size.

Is this Ring Size Chart for Women or Men?

Luckily for everyone, this chart is unisex. It's not like shoe or clothing sizes. I tried to buy a halloween costume once that was marketed towards women. That conversion was messy and took me a solid 30 minutes.

This Ring Sizing Chart is Fast.

It has your size in inches, cm, and mm— all while keeping the U.S. size right along side the metric (mm & cm) and imperial (in) measurements. It's designed to be as easy to use as possible.

How to Find out your Ring Size.

Select whatever measurement you have. If you're looking at this chart, that means you already have one measurement and you need to convert it.

Most likey you have a metric or imperial measurement and you're trying to find your U.S. size. You have your measurement in inches, cm, or mm. Now, you need to figure out which measurement you have.

Ring Size Diameter.

Your diameter measurement means you probably already have a ring and you measured across the opening of it— as if you were looking through the hole of the ring. Head over to the chart and look at Inside Diameter to find your approximate ring size diameter. Once there look over in the U.S. + Canada column to find your corresponding ring size.

Ring Size Circumference.

If you have your circumference measurement handy that means you probably measured your finger at home. Make sure the string or paper you used was tight to your skin when you performed the at home measurement.

Head over to the chart and look at Inside Circumference to find your approximate ring size circumference. Once there look over in U.S. + Canada column to find your corresponding ring size.

Sizes	Inside Diameter			Sizes	Inside Circumference			Sizes
U.S. + Canada	Inches (in)	Millimeters (mm)	Centimeters (cm)	U.S. + Canada	Inches (in)	Millimeters (mm)	Centimeters (cm)	U.S. + Canada	UK
0	0.45	11.43	1.14	0	1.41	35.91	3.59	0
0.25	0.46	11.684	1.17	0.25	1.45	36.71	3.67	0.25
0.5	0.47	11.938	1.19	0.5	1.48	37.50	3.75	0.5	A
0.75	0.48	12.192	1.22	0.75	1.51	38.30	3.83	0.75	A 1/2
1	0.49	12.446	1.24	1	1.54	39.10	3.91	1	B
1.25	0.49	12.446	1.24	1.25	1.54	39.10	3.91	1.25	B 1/2
1.5	0.5	12.7	1.27	1.5	1.57	39.90	3.99	1.5	C
1.75	0.51	12.954	1.30	1.75	1.60	40.70	4.07	1.75	C 1/2
2	0.52	13.208	1.32	2	1.63	41.49	4.15	2	D
2.25	0.53	13.462	1.35	2.25	1.67	42.29	4.23	2.25	D 1/2
2.5	0.54	13.716	1.37	2.5	1.70	43.09	4.31	2.5	E
2.75	0.54	13.716	1.37	2.75	1.70	43.09	4.31	2.75	E 1/2
3	0.55	13.97	1.40	3	1.73	43.89	4.39	3	F
3.25	0.56	14.224	1.42	3.25	1.76	44.69	4.47	3.25	F 1/2
3.5	0.58	14.732	1.47	3.5	1.82	46.28	4.63	3.5	G
3.75	0.59	14.986	1.50	3.75	1.85	47.08	4.71	3.75	G 1/2
4	0.59	14.986	1.50	4	1.85	47.08	4.71	4	H
4.25	0.6	15.24	1.52	4.25	1.88	47.88	4.79	4.25	H 1/2
4.5	0.61	15.494	1.55	4.5	1.92	48.68	4.87	4.5	I
4.75	0.62	15.748	1.57	4.75	1.95	49.47	4.95	4.75	J
5	0.63	16.002	1.60	5	1.98	50.27	5.03	5	J 1/2
5.25	0.63	16.002	1.60	5.25	1.98	50.27	5.03	5.25	K
5.5	0.64	16.256	1.63	5.5	2.01	51.07	5.11	5.5	K 1/2
5.75	0.65	16.51	1.65	5.75	2.04	51.87	5.19	5.75	L
6	0.66	16.764	1.68	6	2.07	52.67	5.27	6	L 1/2
6.25	0.666	16.9164	1.69	6.25	2.09	53.14	5.31	6.25	M
6.5	0.67	17.018	1.70	6.5	2.10	53.46	5.35	6.5	M 1/2
6.75	0.68	17.272	1.73	6.75	2.14	54.26	5.43	6.75	N
7	0.69	17.526	1.75	7	2.17	55.06	5.51	7	N 1/2
7.25	0.7	17.78	1.78	7.25	2.20	55.86	5.59	7.25	O
7.5	0.71	18.034	1.80	7.5	2.23	56.66	5.67	7.5	O 1/2
7.75	0.71	18.034	1.80	7.75	2.23	56.66	5.67	7.75	P
8	0.72	18.288	1.83	8	2.26	57.45	5.75	8	P 1/2
8.25	0.73	18.542	1.85	8.25	2.29	58.25	5.83	8.25	Q
8.5	0.74	18.796	1.88	8.5	2.32	59.05	5.90	8.5	Q 1/2
8.75	0.75	19.05	1.91	8.75	2.36	59.85	5.98	8.75	R
9	0.75	19.05	1.91	9	2.36	59.85	5.98	9	R 1/2
9.25	0.76	19.304	1.93	9.25	2.39	60.65	6.06	9.25	S
9.5	0.77	19.558	1.96	9.5	2.42	61.44	6.14	9.5	S 1/2
9.75	0.78	19.812	1.98	9.75	2.45	62.24	6.22	9.75	T
10	0.79	20.066	2.01	10	2.48	63.04	6.30	10	T 1/2
10.25	0.79	20.066	2.01	10.25	2.48	63.04	6.30	10.25	U
10.5	0.8	20.32	2.03	10.5	2.51	63.84	6.38	10.5	U 1/2
10.75	0.81	20.574	2.06	10.75	2.54	64.64	6.46	10.75	V
11	0.82	20.828	2.08	11	2.58	65.43	6.54	11	V 1/2
11.25	0.83	21.082	2.11	11.25	2.61	66.23	6.62	11.25	W
11.5	0.83	21.082	2.11	11.5	2.61	66.23	6.62	11.5	W 1/2
11.75	0.84	21.336	2.13	11.75	2.64	67.03	6.70	11.75	X
12	0.85	21.59	2.16	12	2.67	67.83	6.78	12	X 1/2
12.25	0.86	21.844	2.18	12.25	2.70	68.62	6.86	12.25	Y
12.5	0.87	22.098	2.21	12.5	2.73	69.42	6.94	12.5	Z
12.75	0.87	22.098	2.21	12.75	2.73	69.42	6.94	12.75	Z 1/2
13	0.88	22.352	2.24	13	2.76	70.22	7.02	13
13.25	0.89	22.606	2.26	13.25	2.80	71.02	7.10	13.25	Z1
13.5	0.9	22.86	2.29	13.5	2.83	71.82	7.18	13.5
13.75	0.91	23.114	2.31	13.75	2.86	72.61	7.26	13.75	Z2
14	0.91	23.114	2.31	14	2.86	72.61	7.26	14	Z3
14.25	0.92	23.368	2.34	14.25	2.89	73.41	7.34	14.25
14.5	0.93	23.622	2.36	14.5	2.92	74.21	7.42	14.5	Z4
14.75	0.94	23.876	2.39	14.75	2.95	75.01	7.50	14.75
15	0.95	24.13	2.41	15	2.98	75.81	7.58	15
15.25	0.95	24.13	2.41	15.25	2.98	75.81	7.58	15.25
15.5	0.96	24.384	2.44	15.5	3.02	76.60	7.66	15.5
15.75	0.97	24.638	2.46	15.75	3.05	77.40	7.74	15.75
16	0.97	24.64	2.46	16	3.05	77.4	7.74	16

And there you have it! This ring chart has everything from mm/ cm to inches and even U.S. sizes. Whether you make jewelry or love to wear pieces, be sure to save it somewhere you can easily access it. The number of times I typed jewelry conversion chart into google before I finally put my own together for easy access was excessive. I saved myself a lot of time by having one handy.

Remember, if you order from me there's free resizing. So it's not the end of the world if there's an error.

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