The World PoolBilliard Association (WPA) approves two different sizes for tournament play, which include 9 foot by 4.5 foot and 8 foot by 4 foot. Pocket billiard tables can come in all sizes, but the shape is always rectangular with a two to one ratio.
The measurements of the playing surface for the 9 foot table is 100 inches by 50 inches, and the playing size for the 8 foot table is 92 inches by 46 inches. The measurements allow for a 1/8 of an inch margin of error. Often referred to as the WPA standard or the American style, the table also features wide angular pockets for the balls that funnel inward.
In order to answer this question you need to set up an equation: let p= pool table length. 30=3/2p. *you can multiply by 2/3 or divide 3/2 (same thing) p=20 ft.
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A regulation sized table is 4 1/2 feet by 9 feet. Thanks for asking ChaCha!
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Shuffleboard, or as it was called at the time, shoveboard or shovelboard tables, were much larger than the tables of today. The tables used in England from the 16th century (the earliest
http://www.ehow.com/about_6116712_regulationsize...

There is a clear definition of "regulation" table, despite what some may tell you. A 9' table (100"x50" playing surface) is a regulation table. The most common
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