XF 2.0 Width of forum


Myself and another Football fan display adverts from the same advert provider.

I run www.yellowsforum.co.uk using V2
He runs https://www.followfollow.com/forum/ V1.5?

When the same advert displays (surrounding the forum content). His forum display is around 2cm larger than my display. This is being viewed on the same screen.

I tried to change the Max page width, but this doesnt solve the issue.

Is there anywhere else i can change the display width?

Many thanks