A regulation pool table is a table that follows the 2-to-1 ratio required for regulation pool table sizes, meaning that the length of the table is precisely twice as long as the width. The most common regulation size tables are 8-foot and 9-foot tables. The playing area of a 9-foot regulation table measures 100 inches long and 50 inches wide. An 8-foot regulation table must be 4 feet wide and 8 feet long. However, standard pool tables can also include regulation size tables when they follow the 2-to-1 ratio. The most popular standard size home pool table is a regulation 8-foot table, followed by the 9-foot regulation pool table. It is important to note that the size of the pool table should be proportional to the space available, and players find it harder to switch between a non-regulation table and a regulation table when the dimensions are off, even if only by a few inches.