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About.com requires 2 full business days to test and prop ad creative submissions. Please allow ample time for this process prior to the ad start date. For example, creative/copy changes that should start on a Monday morning must be received by the beginning of the business day on the previous Thursday.
| Dimensions | Max. File size | Looping |
| 728x90 Banner | Standard Creative 25k / Flash 30k | unlimited |
| 160x600 Super Tower | Standard Creative 25k / Flash 30k | unlimited |
| 336x280 Billboard | Standard Creative 25k / Flash 30k | unlimited |