Ad Unit Guidelines
The IAB Ad Unit Guidelines are intended for marketers, agencies and media companies for use in the creating, planning, buying and selling of interactive marketing and advertising. The IAB’s Ad Sizes Working Group meets on a bi-annual basis to review proposed new ad units and issue updated voluntary guidelines as appropriate. The process whereby these new units are reviewed and considered can be downloaded here.
Rectangles and Pop-Ups
| Recommended Maximum Initial Download Fileweight | Recommended | ||
| 300 x 250 IMU - (Medium Rectangle) | View IMU | 40k | :15 |
| 250 x 250 IMU - (Square Pop-Up) | View IMU | 40k | :15 |
| 240 x 400 IMU - (Vertical Rectangle) | View IMU | 40k | :15 |
| 336 x 280 IMU - (Large Rectangle) | View IMU | 40k | :15 |
| 180 x 150 IMU - (Rectangle) | View IMU | 40k | :15 |
| *NEW* 300x100 IMU - (3:1 Rectangle) | View IMU | 40k | :15 |
| *NEW* 720x300 IMU – (Pop-Under) | View IMU | 40k | :15 |
Banners and Buttons
| 468 x 60 IMU - (Full Banner) | View IMU | 40k | :15 |
| 234 x 60 IMU - (Half Banner) | View IMU | 30k | :15 |
| 88 x 31 IMU - (Micro Bar) | View IMU | 10k | :15 |
| 120 x 90 IMU - (Button 1) | View IMU | 20k | :15 |
| 120 x 60 IMU - (Button 2) | View IMU | 20k | :15 |
| 120 x 240 IMU - (Vertical Banner) | View IMU | 30k | :15 |
| 125 x 125 IMU - (Square Button) | View IMU | 30k | :15 |
| 728 x 90 IMU - (Leaderboard) | View IMU | 40k | :15 |
Skyscrapers
| 160 x 600 IMU - (Wide Skyscraper) | View IMU | 40k | :15 |
| 120 x 600 IMU - (Skyscraper) | View IMU | 40k | :15 |
| 300 x 600 IMU - (Half Page Ad) | View IMU | 40k | :15 |
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