This is the official download page.
Currently the download is around 200 MB. I really doubt that the a video driver can take that much space, but let's say it does. After install at least 1 GB of free space disappears from my HD :)
Browsing through the files I see this:
\NVIDIA ~ 330 MB \Program Files\NVIDIA Corporation ~ 900 MB \ProgramData\NVIDIA ~ 540 MB
And I'm pretty sure I missed a few, because free space seems to decrease by 1 GB after each driver update. Performing a clean install with "3D system software" and "PhysX System Driver" unchecked didn't really help (I came up with the numbers above after I did that).
Maybe I wouldn't care so much about the space if I wasn't running on a SSD, but I'm constantly running low on disk-space. Is there something I can remove here, or another source from where I can download a liter version? I just want the freaking driver, nothing else :)