These are the most common table sizes one might find in a pool hall.

These include:

Six foot table - smallest size of regulation pool table, six feet from end to end.
Eight foot table - The table itself is eight feet from end to end
Super Eight - The table is eight feet from one inside rail to the other longways.
Nine foot - Barely larger than a Super Eight, nine feet from end to end.

Each of the above mentioned have 6 pockets, one at each corner and in the center of the longer sides.