Google Ad Specs.
Google Display Network

Sizes
- Leaderboard: 728 × 90
- Medium Rectangle (M-REC): 300 × 250
- Wide Skyscraper: 160 × 600
- Half Page Ad: 300 × 600
- Mobile Leaderboard: 320 × 50
- Full Banner (static only): 468 × 60
File Details
- Max size: 150KB
- File types: Animated GIF, JPG, JPEG, PNG, SWF
- Animated GIF: Play loops up to 3 times and ends on last slide of animation. Make sure the last slide makes sense as a static image (e.g. Band Name + Tour + Buy Tickets CTA)