Yahoo offers a full range of online display ad formats and across all screens: desktop, mobile, and tablet.
Check this site often for the latest specifications, guidelines, and available formats for Yahoo's homepage or any of Yahoo!'s properties. As a leader in standards and innovation, Yahoo will work with you to run a custom execution or an IAB compliant ad, denoted by an IAB stamp.
All ads must comply with and meet Yahoo's Advertising Policies and Format Guidelines.