Ring Size Conversion Chart (2018) - The Nude Company

Inside diameter	Inside Circumference	Sizes
(mm)	(mm)	United States and Canada	United Kingdom, Ireland, Australia, and New Zealand	China, Japan	Switzerland
11.63	36.5	0
11.84	37.2	¼
12.04	37.8	½	A
12.24	38.5	¾	A½
12.45	39.1	1	B	1
12.65	39.7	1¼	B½
12.85	40.4	1½	C
13.06	41.0	1¾	C½
13.26	41.7	2	D	2	1.5
13.46	42.3	2¼	D½
13.67	42.9	2½	E	3	2.75
13.87	43.6	2¾	E½
14.07	44.2	3	F	4	4
14.27	44.8	3¼	F½	5	5.25
14.48	45.5	3½	G
14.68	46.1	3¾	G½	6	6.5
14.88	46.8	4	H	7
15.09	47.4	4¼	H½		7.75
15.29	48.0	4½	I	8
15.49	48.7	4¾	J		9
15.70	49.3	5	J½	9
15.90	50.0	5¼	K		10
16.10	50.6	5½	K½	10
16.31	51.2	5¾	L		11.75
16.51	51.9	6	L½	11	12.75
16.71	52.5	6¼	M	12
16.92	53.1	6½	M½	13	14
17.12	53.8	6¾	N
17.32	54.4	7	N½	14	15.25
17.53	55.1	7¼	O
17.73	55.7	7½	O½	15	16.5
17.93	56.3	7¾	P
18.14	57.0	8	P½	16	17.75
18.34	57.6	8¼	Q
18.54	58.3	8½	Q½	17
18.75	58.9	8¾	R		19
18.95	59.5	9	R½	18
19.15	60.2	9¼	S		20.25
19.35	60.8	9½	S½	19
19.56	61.4	9¾	T		21.5
19.76	62.1	10	T½	20
19.96	62.7	10¼	U	21
20.17	63.4	10½	U½	22	22.75
20.37	64.0	10¾	V
20.57	64.6	11	V½	23
20.78	65.3	11¼	W		25
20.98	65.9	11½	W½	24
21.18	66.6	11¾	X
21.39	67.2	12	X½	25	27.5
21.59	67.8	12¼	Y
21.79	68.5	12½	Z	26	28.75
22.00	69.1	12¾	Z½
22.20	69.7	13		27
22.40	70.4	13¼	Z1
22.61	71.0	13½
22.81	71.7	13¾	Z2
23.01	72.3	14	Z3
23.22	72.9	14¼
23.42	73.6	14½	Z4
23.62	74.2	14¾
23.83	74.8	15
24.03	75.5	15¼
24.23	76.1	15½
24.43	76.8	15¾
24.64	77.4	16

Ring Size Chart

United States & Canada

Inside diameter	Inside Circumference	Sizes
(mm)	(mm)	United States and Canada
11.63	36.5	0
11.84	37.2	¼
12.04	37.8	½
12.24	38.5	¾
12.45	39.1	1
12.65	39.7	1¼
12.85	40.4	1½
13.06	41	1¾
13.26	41.7	2
13.46	42.3	2¼
13.67	42.9	2½
13.87	43.6	2¾
14.07	44.2	3
14.27	44.8	3¼
14.48	45.5	3½
14.68	46.1	3¾
14.88	46.8	4
15.09	47.4	4¼
15.29	48	4½
15.49	48.7	4¾
15.7	49.3	5
15.9	50	5¼
16.1	50.6	5½
16.31	51.2	5¾
16.51	51.9	6
16.71	52.5	6¼
16.92	53.1	6½
17.12	53.8	6¾
17.32	54.4	7
17.53	55.1	7¼
17.73	55.7	7½
17.93	56.3	7¾
18.14	57	8
18.34	57.6	8¼
18.54	58.3	8½
18.75	58.9	8¾
18.95	59.5	9
19.15	60.2	9¼
19.35	60.8	9½
19.56	61.4	9¾
19.76	62.1	10
19.96	62.7	10¼
20.17	63.4	10½
20.37	64	10¾
20.57	64.6	11
20.78	65.3	11¼
20.98	65.9	11½
21.18	66.6	11¾
21.39	67.2	12
21.59	67.8	12¼
21.79	68.5	12½
22	69.1	12¾
22.2	69.7	13
22.4	70.4	13¼
22.61	71	13½
22.81	71.7	13¾
23.01	72.3	14
23.22	72.9	14¼
23.42	73.6	14½
23.62	74.2	14¾
23.83	74.8	15
24.03	75.5	15¼
24.23	76.1	15½
24.43	76.8	15¾
24.64	77.4	16

United Kingdom & Others

Inside diameter	Inside Circumference	Sizes
(mm)	(mm)	United Kingdom, Ireland, Australia, and New Zealand
11.63	36.5
11.84	37.2
12.04	37.8	A
12.24	38.5	A½
12.45	39.1	B
12.65	39.7	B½
12.85	40.4	C
13.06	41	C½
13.26	41.7	D
13.46	42.3	D½
13.67	42.9	E
13.87	43.6	E½
14.07	44.2	F
14.27	44.8	F½
14.48	45.5	G
14.68	46.1	G½
14.88	46.8	H
15.09	47.4	H½
15.29	48	I
15.49	48.7	J
15.7	49.3	J½
15.9	50	K
16.1	50.6	K½
16.31	51.2	L
16.51	51.9	L½
16.71	52.5	M
16.92	53.1	M½
17.12	53.8	N
17.32	54.4	N½
17.53	55.1	O
17.73	55.7	O½
17.93	56.3	P
18.14	57	P½
18.34	57.6	Q
18.54	58.3	Q½
18.75	58.9	R
18.95	59.5	R½
19.15	60.2	S
19.35	60.8	S½
19.56	61.4	T
19.76	62.1	T½
19.96	62.7	U
20.17	63.4	U½
20.37	64	V
20.57	64.6	V½
20.78	65.3	W
20.98	65.9	W½
21.18	66.6	X
21.39	67.2	X½
21.59	67.8	Y
21.79	68.5	Z
22	69.1	Z½
22.2	69.7
22.4	70.4	Z1
22.61	71
22.81	71.7	Z2
23.01	72.3	Z3
23.22	72.9
23.42	73.6	Z4
23.62	74.2
23.83	74.8
24.03	75.5
24.23	76.1
24.43	76.8
24.64	77.4

Inside diameter	Inside Circumference	Sizes
(mm)	(mm)	China, Japan
11.63	36.5
11.84	37.2
12.04	37.8
12.24	38.5
12.45	39.1	1
12.65	39.7
12.85	40.4
13.06	41
13.26	41.7	2
13.46	42.3
13.67	42.9	3
13.87	43.6
14.07	44.2	4
14.27	44.8	5
14.48	45.5
14.68	46.1	6
14.88	46.8	7
15.09	47.4
15.29	48	8
15.49	48.7
15.7	49.3	9
15.9	50
16.1	50.6	10
16.31	51.2
16.51	51.9	11
16.71	52.5	12
16.92	53.1	13
17.12	53.8
17.32	54.4	14
17.53	55.1
17.73	55.7	15
17.93	56.3
18.14	57	16
18.34	57.6
18.54	58.3	17
18.75	58.9
18.95	59.5	18
19.15	60.2
19.35	60.8	19
19.56	61.4
19.76	62.1	20
19.96	62.7	21
20.17	63.4	22
20.37	64
20.57	64.6	23
20.78	65.3
20.98	65.9	24
21.18	66.6
21.39	67.2	25
21.59	67.8
21.79	68.5	26
22	69.1
22.2	69.7	27
22.4	70.4
22.61	71
22.81	71.7
23.01	72.3
23.22	72.9
23.42	73.6
23.62	74.2
23.83	74.8
24.03	75.5
24.23	76.1
24.43	76.8
24.64	77.4

Inside diameter	Inside Circumference	Sizes
(mm)	(mm)	Switzerland
11.63	36.5
11.84	37.2
12.04	37.8
12.24	38.5
12.45	39.1
12.65	39.7
12.85	40.4
13.06	41
13.26	41.7	1.5
13.46	42.3
13.67	42.9	2.75
13.87	43.6
14.07	44.2	4
14.27	44.8	5.25
14.48	45.5
14.68	46.1	6.5
14.88	46.8
15.09	47.4	7.75
15.29	48
15.49	48.7	9
15.7	49.3
15.9	50	10
16.1	50.6
16.31	51.2	11.75
16.51	51.9	12.75
16.71	52.5
16.92	53.1	14
17.12	53.8
17.32	54.4	15.25
17.53	55.1
17.73	55.7	16.5
17.93	56.3
18.14	57	17.75
18.34	57.6
18.54	58.3
18.75	58.9	19
18.95	59.5
19.15	60.2	20.25
19.35	60.8
19.56	61.4	21.5
19.76	62.1
19.96	62.7
20.17	63.4	22.75
20.37	64
20.57	64.6
20.78	65.3	25
20.98	65.9
21.18	66.6
21.39	67.2	27.5
21.59	67.8
21.79	68.5	28.75
22	69.1
22.2	69.7
22.4	70.4
22.61	71
22.81	71.7
23.01	72.3
23.22	72.9
23.42	73.6
23.62	74.2
23.83	74.8
24.03	75.5
24.23	76.1
24.43	76.8
24.64	77.4

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