Banners appearing very small when inserted into blog post or page

Hi there how are you,

Been using this plugin for a while now and just noticed that the ad banners are not appearing correctly within posts and appear to be very small.

I have cleared cache and can’t seem to find the issue so wondering if this is a known issue.

Could someone please provide assistance with the matter.

Thanks
Alessio

The page I need help with: [log in to see the link]