How big is a professional pool table?

from http://jcbilliards.com/asf.html#1.%20%20What

A standard size pool table is 8 feet. A professional or regulation size table is 9 feet long. Most people purchasing a table for there homes would buy an 8 foot table. Tables that are played in bars and billiards rooms will use a wide range of size from 7 - 10 foot tables, depending on how much room there is.

 

4.5' x 9' Tournament Size