ISO 67 in US Ring Size

ISO 67 ≈ US 12

Ring Size

Inner circumference:66.6-67.9mm

Ring Sizes Around ISO 67

US	UK	ISO / EU	JP / KR	Diameter (mm)	Circumference (mm)
10.5	U	63	23	20.2	63.4
11	V	65	24	20.6	64.6
11.5	W	66	25	21	65.9
12	X	67	26	21.4	67.2
12.5	Y	68	27	21.8	68.5
13	Z	70	28	22.2	69.7
13.5	Z1	71	28+	22.6	71

Nearby sizes:

Does ISO 67 round up or down in US?

Clear the knuckle and measure late in the day; the larger the finger, the more a hot afternoon can add, so a warm-hand size is the safe choice.