These are the most common and used standard banner ad sizes in 2021:
| Dimension | Name | Maximum size |
|---|---|---|
| 250 x 250 | Square | 150 KB |
| 200 x 200 | Small Square | 150 KB |
| 468 x 60 | Banner | 150 KB |
| 728 x 90 | Leaderboard | 150 KB |
| 300 x 250 | Inline Rectangle | 150 KB |
| 336 x 280 | Large Rectangle | 150 KB |
| 120 x 600 | Skyscraper | 150 KB |
| 160 x 600 | Wide Skyscraper | 150 KB |
| 300 x 600 | Half-Page Ad | 150 KB |
| 970 x 90 | Large Leaderboard | 150 KB |
Top Performing Banner Ad Sizes in 2021
| Dimension | Name | Maximum size |
|---|---|---|
| 300 x 250 | Medium rectangle | 150 KB |
| 336 x 280 | Large rectangle | 150 KB |
| 728 x 90 | Leaderboard | 150 KB |
| 300 x 600 | Half page or large skyscraper | 150 KB |
| 320 x 50 | Mobile leaderboard | 150 KB |