As a rule of thumb, for Google Adsense ad sizes, the wider ad sizes tend to outperform their taller counterparts, due to their reader-friendly format.
Readers absorb information in “thought units”, several words at a time.
Wider sizes let them comfortably read more text at a glance without having to skip a line and return to the left margin every few words, as they’d have to with a narrower ad.
If positioned well, wide ad sizes can increase your earnings significantly.
Most Successful Google Ad AdSense Sizes
The best Google ad sizes we’ve found to be the most effective are:
- 336 x 280 large rectangle,
- 300 x 250 medium rectangle,
- 728 x 90 leaderboard,
- 300 x 600 half page
- On mobile the 320 x 100 large mobile banner
What You Should Remember About Adsense Sizes
Bear in mind that while these ad sizes typically perform well, you should use the size that best complements your pages.
It’s better to add one recommended ad unit than two smaller ad units next to each other.