Ring size

From Wikipedia, the free encyclopedia

For the "ring gauge" used for cigars (1/64 inch), see Cigar

A ring sizing stick

There are several systems for denoting the sizes of jewellery rings in use around the world^[1]:

In the United States and Canada, ring sizes are specified using a numerical scale, with quarter and half sizes. An increase of a full size is an increase of 0.032 inch (0.8128 mm) in diameter, or roughly ¹⁄₁₀ inch (more precisely, 0.1005 in or 2.55 mm) in inside circumference.
In the United Kingdom, Ireland, and Australia, ring sizes are specified using an alphabetical scale, with half sizes.
In the European Union (excluding the United Kingdom), ring sizes are specified using a numerical scale, that only has whole sizes.
In Japan, ring sizes are specified using a numerical scale, that only has whole sizes.
In Switzerland, ring sizes are specified using a numerical scale, with quarter and half sizes.
In Germany, ring sizes are specified using actual internal diameter in mm.( same as ISO )

The ISO standard for ring sizes is ISO 8653:1986, which defines standard ring sizes in terms of the inner circumference of the ring measured in millimetres.

1 Conversion chart for ring sizes
2 Finger Size
3 References
4 External Links

[edit] Conversion chart for ring sizes

^[2]

Inside diameter		Inside circumference		Sizes
(in)	(mm)	(in)	(mm)	United States and Canada	United Kingdom, Ireland, and Australia	Japan	Switzerland
0.458	11.63	1.44	36.5	0
0.466	11.84	1.46	37.2	1/4
0.474	12.04	1.49	37.8	1/2	A
0.482	12.24	1.51	38.5	3/4	A 1/2
0.49	12.45	1.54	39.1	1	B	1
0.498	12.65	1.56	39.7	1 1/4	B 1/2
0.506	12.85	1.59	40.4	1 1/2	C
0.514	13.06	1.61	41.0	1 3/4	C 1/2
0.522	13.26	1.64	41.7	2	D	2	1.5
0.53	13.46	1.67	42.3	2 1/4	D 1/2
0.538	13.67	1.69	42.9	2 1/2	E	3	2.75
0.546	13.87	1.72	43.6	2 3/4	E 1/2
0.554	14.07	1.74	44.2	3	F	4	4
0.562	14.27	1.77	44.8	3 1/4	F 1/2	5	5.25
0.57	14.48	1.79	45.5	3 1/2	G
0.578	14.68	1.82	46.1	3 3/4	G 1/2	6	6.5
0.586	14.88	1.84	46.8	4	H	7
0.594	15.09	1.87	47.4	4 1/4	H 1/2		7.75
0.602	15.29	1.89	48.0	4 1/2	I	8
0.61	15.49	1.92	48.7	4 3/4	J		9
0.618	15.70	1.94	49.3	5	J 1/2	9
0.626	15.90	1.97	50.0	5 1/4	K		10
0.634	16.10	1.99	50.6	5 1/2	K 1/2	10
0.642	16.31	2.02	51.2	5 3/4	L		11.75
0.65	16.51	2.04	51.9	6	L 1/2	11	12.75
0.658	16.71	2.07	52.5	6 1/4	M	12
0.666	16.92	2.09	53.1	6 1/2	M 1/2	13	14
0.674	17.12	2.12	53.8	6 3/4	N
0.682	17.32	2.14	54.4	7	N 1/2	14	15.25
0.69	17.53	2.17	55.1	7 1/4	O
0.698	17.73	2.19	55.7	7 1/2	O 1/2	15	16.5
0.706	17.93	2.22	56.3	7 3/4	P
0.714	18.14	2.24	57.0	8	P 1/2	16	17.75
0.722	18.34	2.27	57.6	8 1/4	Q
0.73	18.54	2.29	58.3	8 1/2	Q 1/2	17
0.738	18.75	2.32	58.9	8 3/4	R		19
0.746	18.95	2.34	59.5	9	R 1/2	18
0.754	19.15	2.37	60.2	9 1/4	S		20.25
0.762	19.35	2.39	60.8	9 1/2	S 1/2	19
0.77	19.56	2.42	61.4	9 3/4	T		21.5
0.778	19.76	2.44	62.1	10	T 1/2	20
0.786	19.96	2.47	62.7	10 1/4	U	21
0.794	20.17	2.49	63.4	10 1/2	U 1/2	22	22.75
0.802	20.37	2.52	64.0	10 3/4	V
0.81	20.57	2.54	64.6	11	V 1/2	23
0.818	20.78	2.57	65.3	11 1/4	W		25
0.826	20.98	2.59	65.9	11 1/2	W 1/2	24
0.834	21.18	2.62	66.6	11 3/4	X
0.842	21.39	2.65	67.2	12	X 1/2	25	27.5
0.85	21.59	2.67	67.8	12 1/4	Y
0.858	21.79	2.70	68.5	12 1/2	Z	26	28.75
0.866	22.00	2.72	69.1	12 3/4	Z 1/2
0.874	22.20	2.75	69.7	13		27
0.882	22.40	2.77	70.4	13 1/4	Z1
0.89	22.61	2.80	71.0	13 1/2
0.898	22.81	2.82	71.7	13 3/4	Z2
0.906	23.01	2.85	72.3	14	Z3
0.914	23.22	2.87	72.9	14 1/4
0.922	23.42	2.90	73.6	14 1/2	Z4
0.93	23.62	2.92	74.2	14 3/4
0.938	23.83	2.95	74.8	15
0.946	24.03	2.97	75.5	15 1/4
0.954	24.23	3.00	76.1	15 1/2
0.962	24.43	3.02	76.8	15 3/4
0.97	24.64	3.05	77.4	16

[edit] Finger Size

Gauge rings

A professional jeweler can determine your proper ring size using a set of gauge rings. Other methods such as measuring a strip of paper around the finger can be inaccurate. It’s advisable to visit several jewelers at different times during the day. Fingers will naturally swell in the morning and shrink in the evening. Other factors including temperature, humidity, and exercise can also temporarily change finger size. Wider bands can generally be worn looser. Someone with larger knuckles can wear a looser ring, while slimmer knuckles will require a tighter ring. Most rings can be resized, however rings made of titanium are very difficult to resize.