Rule books at the ready: Question regarding novice black and yellow square

[Draven]

I'm starting my first race in a couple of weeks (less now, excited and nervious) and I have one piece of car preparation left to do.
The Yellow Square with a black X on it, to mark me out as a noivice.

I know I need one because I remember reading it in the regulations somwhere, but I've searched through the yearbook and I cannot find the dimensions that the square has to be.
(I've also searched the web and this forum and cant find the info anywhere).

So in the interests of using the vast pool of knowladge that reside on 10/10's can anyone tell me how big does the "learners" square have to be?

[Tim Falce]

Rule J 12:3 page 126, 2006 Blue Book. Square 7X7 inches with a black cross with a stroke length of 6 inches long X 1 inch wide.

[Draven]

Cheers for that, I'm going blind re-reading the rule book.

[Chris Y]

..Or you could buy a ready-made sticker from the likes of 'Tweaks, etc.