Do web designers use the standard IAB web advert sizes when adding banners?
I was wondering if there are standard sizes which designers use when you want to reserve space for a web advert on their website design. I'm aware of these sizes given by IAB: http://en.wikipedia.org/wiki/Web_banner#Standard_sizes. Then there are also the Google Ad sizes: https://support.google.com/adsense/answer/6002621?hl=en. I want to know which sizes are most commonly used by Web Designers when reserving space.