A text ad typically includes a title that's also a clickable link to a webpage, one or two lines of text, and a website address. Here are some examples of text ads:
Recommended
Medium rectangle (300 x 250)
Large rectangle (336 x 280)
Leaderboard (728 x 90)
Wide skyscraper (160x600)
Other - horizontal
Other - vertical
Skyscraper (120x600)
Vertical banner (120 x 240)
Large skyscraper (300 x 600)
Other - square
Square (250 x 250)
Small square (200 x 200)
Small rectangle (180 x 150)
Button (125x125)