Ring Size Chart for Engagement, Wedding, Costume Rings

Published: 2019-12-19 - Updated: 2021-12-05
Author: Disabled World - Contact Details
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Synopsis: Sizing measurement chart for engagement, wedding and costume design finger ring sizes. To decrease the ring size a jeweler can make a small cut in the center of the ring and remove excess material until the band is the requested size. The United States and Canada use a numerical ring size scale which include half and quarter sizes. Some other countries use an alphabetical sizing scale.

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Ring Sizing Information

Engagement and wedding rings are always sized on a universal standard scale so that sizes remain constant across jewelery stores in a particular country. These ring sizes are classed in millimeters - which is the measurement based on the inner circumference of the ring.

The United States and Canada use a numerical ring size scale which include half and quarter sizes. Some other countries use an alphabetical sizing scale.

To decrease the ring size a jeweler can make a small cut in the center of the ring and remove excess material until the band is the requested size.

A ring that doesn't quite fit can often be stretched to a maximum of half a size larger - if the required size exceeds this measurement extra metal will be soldered into the middle of the band.

Wedding Anniversary Names by Years Married : List of wedding anniversaries by year including names of materials, symbols and flowers associated with the time married anniversary.

Two plain gold wedding - or engagement - rings entwined together.

Costume, Engagement and Wedding Ring Size Chart

Ring Size Conversions Table
US/Canada	UK/Australia	Japan	China	Diameter (inch)	Diameter (mm)	Circumference (inch)	Circumference (mm)
0	-	-	-	0.458	11.63	1.44	36.5
1/4	-	-	-	0.466	11.84	1.46	37.2
1/2	A	-	-	0.474	12.04	1.49	37.8
3/4	A 1/2	-	-	0.482	12.24	1.51	38.5
1	B	1	1	0.49	12.45	1.54	39.1
1 1/4	B 1/2	-	-	0.498	12.65	1.56	39.7
1 1/2	C	-	-	0.506	12.85	1.59	40.4
1 3/4	C 1/2	-	-	0.514	13.06	1.61	41.0
2	D	2	2	0.522	13.26	1.64	41.7
2 1/4	D 1/2	-	-	0.53	13.46	1.67	42.3
2 1/2	E	3	3	0.538	13.67	1.69	42.9
2 3/4	E 1/2	-	-	0.546	13.87	1.72	43.6
3	F	4	4	0.554	14.07	1.74	44.2
3 1/4	F 1/2	5	5	0.562	14.27	1.77	44.8
3 1/2	G	-	-	0.57	14.48	1.79	45.5
3 3/4	G 1/2	6	6	0.578	14.68	1.82	46.1
4	H	7	7	0.586	14.88	1.84	46.8
4 1/4	H 1/2	-	-	0.594	15.09	1.87	47.4
4 1/2	I	8	8	0.602	15.29	1.89	48.0
4 3/4	J	-	-	0.61	15.49	1.92	48.7
5	J 1/2	9	9	0.618	15.70	1.94	49.3
5 1/4	K	-	-	0.626	15.90	1.97	50.0
5 1/2	K 1/2	10	10	0.634	16.10	1.99	50.6
5 3/4	L	-	-	0.642	16.31	2.02	51.2
6	L 1/2	11	11	0.65	16.51	2.04	51.9
6 1/4	M	12	12	0.658	16.71	2.07	52.5
6 1/2	M 1/2	13	13	0.666	16.92	2.09	53.1
6 3/4	N	-	-	0.674	17.12	2.12	53.8
7	N 1/2	14	14	0.682	17.32	2.14	54.4
7 1/4	O	-	-	0.69	17.53	2.17	55.1
7 1/2	O 1/2	15	15	0.698	17.73	2.19	55.7
7 3/4	P	-	-	0.706	17.93	2.22	56.3
8	P 1/2	16	16	0.714	18.14	2.24	57.0
8 1/4	Q	-	-	0.722	18.34	2.27	57.6
8 1/2	Q 1/2	17	17	0.73	18.54	2.29	58.3
8 3/4	R	-	-	0.738	18.75	2.32	58.9
9	R 1/2	18	18	0.746	18.95	2.34	59.5
9 1/4	S	-	-	0.754	19.15	2.37	60.2
9 1/2	S 1/2	19	19	0.762	19.35	2.39	60.8
9 3/4	T	-	-	0.77	19.56	2.42	61.4
10	T 1/2	20	20	0.778	19.76	2.44	62.1
10 1/4	U	21	21	0.786	19.96	2.47	62.7
10 1/2	U 1/2	22	22	0.794	20.17	2.49	63.4
10 3/4	V	-	-	0.802	20.37	2.52	64.0
11	V 1/2	23	23	0.81	20.57	2.54	64.6
11 1/4	W	-	-	0.818	20.78	2.57	65.3
11 1/2	W 1/2	24	24	0.826	20.98	2.59	65.9
11 3/4	X	-	-	0.834	21.18	2.62	66.6
12	X 1/2	25	25	0.842	21.39	2.65	67.2
12 1/4	Y	-	-	0.85	21.59	2.67	67.8
12 1/2	Z	26	26	0.858	21.79	2.70	68.5
12 3/4	Z 1/2	-	-	0.866	22.00	2.72	69.1
13	-	27	27	0.874	22.20	2.75	69.7
13 1/4	Z1	-	-	0.882	22.40	2.77	70.4
13 1/2	-	-	-	0.89	22.61	2.80	71.0
13 3/4	Z2	-	-	0.898	22.81	2.82	71.7
14	Z3	-	-	0.906	23.01	2.85	72.3
14 1/4	-	-	-	0.914	23.22	2.87	72.9
14 1/2	Z4	-	-	0.922	23.42	2.90	73.6
14 3/4	-	-	-	0.93	23.62	2.92	74.2
15	-	-	-	0.938	23.83	2.95	74.8
15 1/4	-	-	-	0.946	24.03	2.97	75.5
15 1/2	-	-	-	0.954	24.23	3.00	76.1
15 3/4	-	-	-	0.962	24.43	3.02	76.8
16	-	-	-	0.97	24.64	3.05	77.4

*This chart is intended to aid people in finding an approximate international equivalent ring size. Disabled World takes no responsibility for any calculation errors.

Printable Ring Size Chart

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Printable chart of international costume, engagement and wedding ring sizes.

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