RING CHART – Purejenta Jewellery

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Ring Size Equivalents

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MM to Inch Conversion Table
mm	approx. inches
1mm	1/32"
2mm	1/16"
3mm	3/32"
4mm	1/8"
5mm	3/16"
6mm	Just under 1/4"
7mm	Just over 1/4"
8mm	5/16"
9mm	Just under 3/8"
10mm	Just over 3/8"
11mm	7/16"
12mm	Just under 1/2"
13mm	Just over 1/2"
14mm	9/16"
15mm	Just under 5/8"
16mm	5/8"
17mm	Just under 11/16"
18mm	Just under 3/4"
19mm	Just over 3/4"
20mm	Just under 13/16"
21mm	Just over 13/16"
22mm	Just under 7/8"
23mm	Just over 7/8"
24mm	15/16"
25mm	1"

Ring Size Equivalents
U.S. & Canada	Inside Diameter	Inside Circumference	Great Britain	France	Germany	Japan	Switzerland
3-1/2	...	...	...	...	14-1/2	...	...
3-3/4	...	...	H	46-1/2	...	6-1/2	6-1/2
4	16 mm	50 mm	H-1/2	...	15	7	...
4-1/4	...	...	I	47-3/4	...	...	7-3/4
4-1/2	...	...	I-1/2	...	15-1/4	8	...
4-3/4	...		J	49	...	...	9
5	17 mm	53 mm	J-1/2	...	15-3/4	9	...
5-1/4	...	...	K	50	...	...	10
5-1/2	...	...	L	51-3/4	16	...	11-3/4
5-3/4	...	...	L-1/2	...	...	11	...
6	17.5 mm	55 mm	M	52-3/4	16-1/2	12	12-3/4
6-1/2	...	...	N	54	17	13	14
7	18 mm	57 mm	O	55-1/4	17-1/4	14	15-1/4
7-1/2	...	...	P	56-1/2	17-3/4	15	16-1/2
8	19 mm	60 mm	Q	57-3/4	18	16	17-3/4
8-1/2	...	...	...	...	18-1/2	17	...
8-3/4	...	...	R	59	...	...	19
9	20 mm	63 mm	...	...	19	18	...
9-1/4	...	...	S	60-1/4	...	...	20-1/4
9-1/2	...	...	...	...	19-1/2	19	...
9-3/4	...	...	T	61-1/2	...	...	21-1/2
10	21 mm	66 mm	T-1/2	...	20	20	...
10-1/4	...	...	U	62-3/4	...	21	22-3/4
10-1/2	...	...	U-1/2	...	20-1/4	22	...
10-3/4	...	...	V	63-3/4	...	...	23-3/4
11	21.5 mm	68 mm	V-1/2	...	20-3/4	23	...
11-1/4	...	...	W	65	...	...	25
11-1/2	...	...	...	...	21	24	...
11-3/4	...	...	X	66-1/4	...	...	26-1/4
12	22.5 mm	71 mm	Y	67-1/2	21-1/4	25	27-1/2
12-1/2	...	...	Z	68-3/4	21-3/4	26	28-3/4
13	23 mm	73 mm	...	...	22	27	...

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