Hotwheels Track size?

For a future instructable, I need to know; What is the size of Hotwheels track. ie the inside wideh and the height of the side walls? Any help appreciated.

Kiteman4 years ago
As I recall, it's only one or two millimetres wider than the cars themselves.
This will help the group of photos has a print with dimensions. http://www.thingiverse.com/thing:119096

I attached the print here.
MB_HW_Toy_Track_4inch_preview_featured[1].jpg