UK Ring Size Comparison Table

Compare UK ring sizes across different countries and systems

UK Ring Size Comparison Table

US	UK	EU	JP	IN	AU	CA	ZA	Diameter (mm)	Circumference (mm)
3	F	44	4	4	F	3	F	14.10	44.30
3.5	G	45	5	5	G	3.5	G	14.50	45.55
4	H	47	7	7	H	4	H	14.90	46.81
4.5	I	48	8	8	I	4.5	I	15.30	48.07
5	J	49	9	9	J	5	J	15.70	49.32
5.5	K	50	10	10	K	5.5	K	16.10	50.58
6	L	51	11	11	L	6	L	16.50	51.84
6.5	M	52	12	12	M	6.5	M	16.90	53.09
7	N	54	13	13	N	7	N	17.30	54.35
7.5	O	55	14	14	O	7.5	O	17.70	55.61
8	P	57	16	16	P	8	P	18.10	56.86
8.5	Q	58	17	17	Q	8.5	Q	18.50	58.12
9	R	59	18	18	R	9	R	18.90	59.38
9.5	S	60	19	19	S	9.5	S	19.30	60.63
10	T	62	20	20	T	10	T	19.70	61.89
10.5	U	63	21	21	U	10.5	U	20.10	63.15
11	V	64	22	22	V	11	V	20.50	64.40
11.5	W	65	23	23	W	11.5	W	20.90	65.66
12	X	67	24	24	X	12	X	21.30	66.92
12.5	Y	68	25	25	Y	12.5	Y	21.70	68.17
13	Z	69	26	26	Z	13	Z	22.10	69.43

Frequently Asked Questions

General Questions

4 questions

The table is based on standard UK sizing charts, but actual sizes may vary by manufacturer or region. Always confirm your size with a professional jeweler before purchasing.

Yes, you can find your known UK size in one system and read across to see the equivalent in other systems. Use the unit toggle to view diameter and circumference in mm or inches.

If your exact UK size is not listed, choose the closest available size or consult a jeweler for a custom fit.

Not all sizing systems have a direct equivalent for every size. A '-' means no standard equivalent exists for that system at that size.

UK Ring Size Comparison Table