"Unlimited" Campaign banner sizes on the Google Adwords display network.
The top 3 banner sizes comprise 78% of all served ad impressions:
Medium Rectangle: 300×250
Leaderboard: 728×90
Wide Skyscraper: 160×600
One-Click Website Campaign October 2015 banner sizes on the Google Adwords display network.
The top 3 banner sizes comprise 78% of all served ad impressions:
Medium Rectangle: 300×250 (jpg and png)
Leaderboard: 728×90 (jpg and png)
Wide Skyscraper: 160×600 (jpg and png)