Moissanite Ring Moissanite Size International Ring Size Conversion Chart

Jun 29, 2021

Leave a message

If you are interested in our products, please contact us

Email:

sales@hmois.com

amytian@hmois.com

moissanite520@163.com

whatapp:+86-18636984698

skype:amy.tian2

Line: +86-18636984698

International Ring Size Conversion Chart

We are pleased to present the most accurate American to British ring size conversion chart on the web.

United States and Canada			UK, Australia, New Zealand, South Africa			Diameter Variance (mm)
Circumference (mm)	Diameter (mm)	Ring Size	Circumference (mm)	Diameter (mm)	Ring Size	Diameter Variance (mm)
36.5	11.6	0
37.2	11.8	¼	37.5	11.9	A	-0.10
37.8	12.0	½	38.1	12.1	A½	-0.10
38.5	12.2	¾	38.8	12.3	B	-0.09
39.1	12.4	1	39.4	12.5	B½	-0.09
39.7	12.6	1¼	40.0	12.7	C	-0.09
40.4	12.8	1½	40.6	12.9	C½	-0.08
41.0	13.1	1¾	41.3	13.1	D	-0.08
41.6	13.3	2	41.9	13.3	D½	-0.07
42.3	13.5	2¼	42.5	13.5	E	-0.07
42.9	13.7	2½	43.1	13.7	E½	-0.07
43.6	13.9	2¾	43.8	13.9	F	-0.06
44.2	14.1	3	44.4	14.1	F½	-0.06
44.8	14.3	3¼	45.0	14.3	G	-0.05
45.5	14.5	3½	45.6	14.5	G½	-0.05
46.1	14.7	3¾	46.3	14.7	H	-0.04
46.8	14.9	4	46.9	14.9	H½	-0.04
47.4	15.1	4¼	47.5	15.1	I	-0.04
48.0	15.3	4½	48.1	15.3	I½	-0.03
48.7	15.5	4¾	48.8	15.5	J	-0.03
49.3	15.7	5	49.4	15.7	J½	-0.02
49.9	15.9	5¼	50.0	15.9	K	-0.02
50.6	16.1	5½	50.6	16.1	K½	-0.01
51.2	16.3	5¾	51.3	16.3	L	-0.01
51.9	16.5	6	51.9	16.5	L½	-0.01
52.5	16.7	6¼	52.5	16.7	M	0.00
53.1	16.9	6½	53.1	16.9	M½	0.00
53.8	17.1	6¾	53.8	17.1	N	0.01
54.4	17.3	7	54.4	17.3	N½	0.01
55.0	17.5	7¼	55.0	17.5	O	0.02
55.7	17.7	7½	55.6	17.7	O½	0.02
56.3	17.9	7¾	56.3	17.9	P	0.02
57.0	18.1	8	56.9	18.1	P½	0.03
57.6	18.3	8¼	57.5	18.3	Q	0.03
58.2	18.5	8½	58.1	18.5	Q½	0.04
58.9	18.7	8¾	58.8	18.7	R	0.04
59.5	18.9	9	59.4	18.9	R½	0.05
60.2	19.1	9¼	60.0	19.1	S	0.05
60.8	19.4	9½	60.6	19.3	S½	0.05
61.4	19.6	9¾	61.3	19.5	T	0.06
62.1	19.8	10	61.9	19.7	T½	0.06
62.7	20.0	10¼	62.5	19.9	U	0.07
63.3	20.2	10½	63.1	20.1	U½	0.07
64.0	20.4	10¾	63.8	20.3	V	0.08
64.6	20.6	11	64.4	20.5	V½	0.08
65.3	20.8	11¼	65.0	20.7	W	0.08
65.9	21.0	11½	65.6	20.9	W½	0.09
66.5	21.2	11¾	66.3	21.1	X	0.09
67.2	21.4	12	66.9	21.3	X½	0.10
67.8	21.6	12¼	67.5	21.5	Y	0.10
68.5	21.8	12½	68.1	21.7	Y½	0.11
69.1	22.0	12¾	68.8	21.9	Z	0.11
69.7	22.2	13	69.4	22.1	Z½	0.11
70.4	22.4	13¼	70.0	22.3	Z1	0.12
71.0	22.6	13½	70.6	22.5	Z1½	0.12
71.6	22.8	13¾	71.3	22.7	Z2	0.13
72.3	23.0	14	71.9	22.9	Z2½	0.13
72.9	23.2	14¼	72.5	23.1	Z3	0.13
73.6	23.4	14½	73.1	23.3	Z3½	0.14
74.2	23.6	14¾	73.8	23.5	Z4	0.14
74.8	23.8	15	74.4	23.7	Z4½	0.15
75.5	24.0	15¼	75.0	23.9	Z5	0.15
76.1	24.2	15½	75.6	24.1	Z5½	0.16
76.8	24.4	15¾	76.3	24.3	Z6	0.16
77.4	24.6	16	76.9	24.5	Z6½	0.16

** The diameter variance is the difference between the American Sizes and the British sizes. For example, a US size 4 has a diameter of 14.9mm (rounded up) and a UK H 1/2 has a diameter of 14.9 (rounded down). Because of rounding, the US size 4 is 0.04 mm smaller than the UK H 1/2.