what size of lugs do i have

[TechBoyJK]

I'm trying to figure out the size of my lugs on my car.

it's a 2004 z4

I called bmw and they said the lug size is

m12x1.5

Does that mean I need a 12mm socket?

 

[NutBucket]

M12x1.5 is the thread size. The size of the nut is likely 19 or 21mm.