Are grass tennis courts smaller than clay tennis courts?

Answer 1

No, All Tennis courts are 78 feet long by 36 feet wide including the doubles tramlines. It may seem that grass courts are smaller either by the camera focal lengths used or the fact that clay courts hold up the ball bounce and so slow down the play.

Answer 2

Historically, Grass is the fastest of all surfaces and Clay is the slowest. Though, in the last decade Wimbledon has experimented with their surface to slow it down. Big serves were dictating play too much. I also believe that the clay at Roland Garos (French Open) played faster than in years past in '09.

With that being said, Grass, even though slower than 10 years ago, and Clay, arguably faster, Grass is still considerably faster than clay.