This is a chart that will be extremely helpful for you to determine the ring size that you need. You can either make use of a tape or a small piece of string to measure the area that will be occupied by the ring. When it becomes a complete circle, make a mark on such string. This will be helpful for you to compare with the chart that is mentioned below. the Bold one's are our available sizes

Inside Diameter	Inside Circumference	SIZE
MM	MM	US / Canada	UK / Australia / South Africa	France / Germany	Europe / Italy / Spain
14.1	44.2	3	F	44	4.25
14.5	45.5	3.5	G	45.5	5.5
14.9	46.8	4	H	47	6.75
15.3	48	4.5	I	48	8
15.7	49.3	5	J-½	50	9.25
16.1	50.6	5.5	K-½	51	10.5
16.5	51.9	6	L-½	52	11.75
16.9	53.1	6.5	M-½	53	13.25
17.3	54.4	7	N-½	54	14.5
17.7	55.7	7.5	O-½	56	15.75
18.1	57	8	P-½	57	17
18.5	58.3	8.5	Q-½	58	18.25
19	59.5	9	R-½	60	19.5
19.4	60.8	9.5	S-½	61	20.75
19.8	62.1	10	T-½	62	22
20.2	63.4	10.5	U-½	63	23.25
20.6	64.6	11	V-½	64	24.75
21	65.9	11.5	W-½	66	26
21.4	67.2	12	X-½	67	27.25
21.8	68.5	12.5	Z	68	28.5
22.2	69.7	13	Z+1	70	29.75
22.6	71	13.5	Z+1.5	71	31
23	72.3	14	Z+2	72	32.25
23.4	73.5	14.5	Z+2.5	73.5	33.5
23.8	74.8	15	Z+3	75	34.75

OTHER TIPS

1) *Measure your finger in warm temperatures at the end of the day.

2) *If your knuckle is a lot larger than the base of your finger,measure both the base of your finger and your knuckle and select a size between the two.

3) *When considering a wide band, move up a size from your measurement, for comfort’s sake.

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