RING SIZE GUIDE

Inside Diameter (mm)	UK	US	EU
15 mm	H	4	46
15.25 mm	I	4.50	48
15.75 mm	K	5.25	50
16.50 mm	L	6	52
17.25 mm	N	6.75	54
17.75 mm	O	7.50	56
18.35 mm	Q	8.25	58
18.90 mm	S	9	60

Measure the internal diameter of a ring that fits your desired finger, then use the chart above to determine your size. Alternatively, if you know your international size, use the chart to convert it.