International Size Conversion Guide

Use our Int’l ring size conversion chart table in MM or Inches for different countries.

Bracelet Sizes

MM size	Countries A	Countries B	Countries C	Countries D	Countries E
177.8	7.0”	17.7cm	17.7cm	7.0”	17.7cm
184.15	7.25”	18.4cm	18.4cm	7.25”	18.4cm
196.85	7.75”	19.7cm	19.7cm	7.75”	19.7cm
203.2	8.0”	20.3cm	20.3cm	8.0”	20.3cm
209.55	8.25”	20.9cm	20.9cm	8.25”	20.9cm
215.19	8.5”	21.5cm	21.5cm	8.5”	21.5cm

Chain Sizes

MM size	Countries A	Countries B	Countries C	Countries D	Countries E
406.4	16”	40.6cm	40.6cm	16”	40.6cm
419.1	16.5”	41.9cm	41.9cm	16.5”	41.9cm
431.8	17”	43.2cm	43.2cm	17”	43.2cm
445.5	17.5”	44.6cm	44.6cm	17.5”	44.6cm
457.2	18”	45.7cm	45.7cm	18”	45.7cm
469.9	18.5”	46.9cm	46.9cm	18.5”	46.9cm
482.6	19”	48.2cm	48.2cm	19”	48.2cm
495.3	19.5”	49.5cm	49.5cm	19.5”	49.5cm
508	20”	50.8cm	50.8cm	20”	50.8cm
533.4	21”	53.3cm	53.3cm	21”	53.3cm
558.8	22”	55.9cm	55.9cm	22”	55.9cm
584.2	23”	58.4cm	58.4cm	23”	58.4cm
609.6	24”	60.9cm	60.9cm	24”	60.9cm
635	25”	63.5cm	63.5cm	25”	63.5cm
660.4	26”	66.0cm	66.0cm	26”	66.0cm
685.8	27”	68.6cm	68.6cm	27”	68.6cm
711.2	28”	71.1cm	71.1cm	28”	71.1cm
736.6	29”	73.7cm	73.7cm	29”	73.7cm
762	30”	76.2cm	76.2cm	30”	76.2cm
914.4	36”	91.4cm	91.4cm	36”	91.4cm

Gents Ring Sizes

MM size	Countries A	Countries B	Countries C	Countries D	Countries E	Countries F
17.75	P		56 1/2	7 1/2	15	17 3/4
17.8		16
17.97	P 1/2			7 3/4
18.1		17
18.19	Q		57 3/4	8	16	18
18.35	Q 1/2			8 1/4
18.53	Q 3/4	18		8 1/2	17	18 1/2
18.61	R		59	8 5/8
18.8	R 1/2	19		8 7/8
18.89	R 3/4			9	18	19
18.95
19
19.1	S		60 1/4	9 1/8
19.2		20
19.31	S 1/2			9 3/8
19.41	S 3/4			9 1/2	19	19 1/2
19.51	T	21	61 1/2	9 5/8
19.84	T 1/2	22		10	20	20
20.02	U	23	62 3/4	10 1/4	21
20.2	U 1/2			10 1/2	22	20 1/4
20.32	V	24	63	10 5/8
20.68	V 1/2	25		11	23	20 3/4
20.76	W		65	11 1/8
20.94	W 1/2	26		11 3/8
21
21.08	W 3/4			11 1/2	24	21
21.18	X	27	66 1/4	11 5/8
21.3	X 1/2			11 7/8
21.49	Y	28	67 1/2	12	25	21 1/4
21.69	Y 1/2			12 1/4
21.89	Z	29	68 3/4	12 1/2	26	21 3/4
22.1	Z + 1/2			12 3/4
22.33	Z + 1			13	27	22
22.6	Z + 1.5			13.5
22.69	Z + 2
22.92	Z + 2.5
23.06	Z + 3
23.24	Z + 3.5
23.47	Z + 4
23.55	Z + 4.5
23.87	Z + 5
24.27	Z + 6

Ladies Ring Sizes

MM size	Countries A	Countries B	Countries C	Countries D	Countries E	Countries F
9.91				0
10.72				0
11.53				0
11.95	A			1/2
12.18	A 1/2			3/4
12.37	B			1	1
12.6	B 1/2			1 1/4
12.78	C			1 1/2
13	C 1/2			1 3/4
13.21	D	1 1/2	41 1/2	2	2	13 1/2
13.41	D 1/2			2 1/4
13.61	E	2 3/4	42 3/4	2 1/2	3	13 3/4
13.83	E 1/2			2 3/4
14.05	F	4	44	3	4	14
14.15	F 1/2			3 1/8
14.36	G	5	45 1/4	3 3/8	5	14 1/2
14.45	G 1/4			3 1/2
14.56	G 1/2			3 5/8	6
14.65	H	6	46 1/2	3 3/4
14.86	H 1/2	7		4	7	15
15
15.04	I		47 3/4	4 1/4
15.27	I 1/2	8		4 1/2	8	15 1/4
15.4	J		49	4 5/8		15 1/2
15.7	J 1/2	9		5	9	15 3/4
15.8	K		50	5 1/8
15.9				5 1/4
16	K 1/2	10		5 3/8	10
16.1	L		51 3/4	5 1/2		16
16.2		11
16.41	L 1/2			5 7/8
16.51	M	12	52 3/4	6	12	16 1/2
16.71	M 1/2			6 1/4
16.8		13
16.92	N		54	6 1/2	13	17
17.13	N 1/2			6 3/4
17.2		14
17.35	O		55 1/4	7	14	17 1/4
17.45	O 1/2	15		7 1/4
17.75	P		56 1/2	7 1/2	15	17 3/4
17.8		16
17.97	P 1/2			7 3/4
18.1		17
18.19	Q		57 3/4	8	16	18
18.35	Q 1/2			8 1/4
18.53	Q 3/4	18		8 1/2	17	18 1/2
18.61	R		59	8 5/8
18.8	R 1/2	19		8 7/8
18.89	R 3/4			9	18	19
18.95
19
19.1	S		60 1/4	9 1/8
19.2		20
19.31	S 1/2			9 3/8
19.41	S 3/4			9 1/2	19	19 1/2
19.51	T	21	61 1/2	9 5/8
19.84	T 1/2	22		10	20	20

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