I think the simple answer is: Racetracks don't use cones, they use those flappy thingies that are bolted to the ground. Autocross does use cones though so maybe one of the RL autocrossers here can tell us something about the size.

some pics:
http://formel3.com/fotos/2007-04-29/2007-04-29-072.jpg
http://evcl.com/914/Pics/OATvsConesSm.JPG
http://www.dortmunder-motorspo ... b.de/images/slalom_23.jpg
http://www.westsideracing.no/images/Hockenheim2006_05.JPG

[Edit:
The Wikipedia result is better]

Here you go, about halfway down the page

Originally Posted by pasibrzuch
But these are for highway purpose.
It's sad that there are so many homeless people on this forum Leave other country, go to US! Then you will be able to tell what are standard cones, what are highway cones and many other interesting things


Homeless people now have acess to the internet?

Doesn't the FIA have technical regulations that state what can and what cannot be on a track? I think that a realistic racing game (simulation) should respect the... realistic FIA regulations.

For example: http://www.fia.com/sport/Regulations/circuitregs.html

Cheers

Quote from pasibrzuch :

So how dare You talk about standard cones in US&A when you don't live there? There are no race tracks in ocean so come on man, there are plenty of countries to live

Well, I'm omnipresent. I am right behind you! And everyone else in the world, (especially good looking women in the shower).