When making a purchase for a ring at Tiffanysets.com, all sizes chosen while making your purchase at our website are based on the AMERICAN ring size. You may use the table below to convert your ring size to an American size.

Tiffanysets.com RING SIZE CONVERTOR
American Size	UK Size	Europe Size	Asian Size	Inside Diameter (mm)
5	J	49	11	15.40
5.5	J ½	50	12	15.81
6	L	51	13	16.23
6.5	M	53	14	16.68
7	N	54	15	17.09
7.5	O	55	16	17.52
8	P	56	17	17.90
8.5	P ½	58	18	18.28
9	R	59	19	18.69
9.5	S	60	20	19.12
10	T	62	21	19.55
10.5	U ½	63	22	20.05
11	V ½	64	23	20.37
11.5	W	66	24	20.83
12	X ½	67	25	21.32
12.5	Y ½	68	26	21.65
13	Z ½	69	27	22.10

Please not that most of the rings sold on our website are available from American Size 5 to 11. If you require other sizes, please email us before you make your purchase and we will advise you if we have stock available for those sizes