: : : Size Chart : : :

Sirciam rings are available in the sizes listed below.

We do offer quarter sizes by special request. During the checkout process please 'add order note' and we would be happy to accommodate you.

INTERNAL DIAMETER	USA & CANADA	UK	EUROPE	JAPAN
13.7 mm	2.5	E	42 3/4	3
14.1 mm	3	F	44	4
14.5 mm	3.5	G	45 /14	5
14.8 mm	4	H 1/2	46 1/2	7
15.2 mm	4.5	I 1/2	47 3/4	8
15.7mm	5	J 1/2	50	9
16.1mm	5.5	L	51 3/4	10 1/2
16.5mm	6	M	52 3/4	12
16.9 mm	6.5	N	54	13
17.3 mm	7	O	55 1/4	14
17.7 mm	7.5	P	56 1/2	15
18.2 mm	8	Q	57 3/4	16
18.5 mm	8.5	Q 1/2	58 1/2	17
18.9 mm	9	R 1/2	60	18
19.4 mm	9.5	S 1/2	61 1/2	19
19.8 mm	10	T 1/2	62 1/4	20
20.2 mm	10.5	U 1/2	63	22
20.7 mm	11	V 1/2	64 1/2	23
21.1 mm	11.5	W 1/2	66 1/4	24
21.5 mm	12	Y	67 1/2	25
21.9 mm	12.5	Z	68 3/7	26
22 mm	13	Z+1	70	27