3 Yahoo Confidential & Proprietary N / Leaderboard Flash 40KB SWF, Flash 9 AS2 or below, 25fps or below Image40KB JPG or GIF Animation30 seconds recommended Border Required on all sides if colour tone of the creative does not contrast well with page background Dimensions728×90 Turnaround3 working days Third party servingAvailable, IFRAME tags required Third party tracking Click commands and one 1×1 pixel per ad Video and AudioAvailable, +2 working days Polite downloadingAvailable, +2 working days Ad Specs