Here is a link to the springs most of us use. Eibach Pro-Kit Spring Set. They claim it will lower 1"" in the front and 1.2" in the rear. I think in practice, it will actually lower the car more like 1.25" in the front and 1.5" in the rear. The 1.25" and 1.5" are the numbers I used to convert to mm for you. Hope this helps.

Mine is lowered about -32 and -38: