The variety of Adsense Ad formats means that you can integrate Adsense into almost any spot on your website. There are currently 10 standard Ad formats and 6 Adlink formats.

The Standard Adsense Ad Formats

Horizontal Ad Formats
1. 728 x 90: Leaderboard
2. 468 x 60: Banner
3. 234 x 60: Half Banner

Vertical Ad Formats
4. 120 x 600: Skyscraper
5. 120 x 140: Vertical Banner

Square Ad Formats
6. 125 x 125: Button
7. 300 x 250: Medium Rectangle
8. 250 x 250: Square
9. 336 x 280: Large Rectangle
10. 180 x 150: Small Rectangle

Read about Adsense Ad Format Optimization.

The Adsense Adlinks Formats

Horizontal Adlink Formats
1. 728 x 15
2. 468 x 15

Square Adlink Formats
3. 200 x 90
4. 180 x 90
5. 160 x 90
6. 120 x 90

Read about Adsense Adlink Optimization.