This chart shows how much room you need in order to play comfortably on different pool table dimensions. A good rule of thumb is to give yourself five feet around the edge of the table. The standard length of a cue is 57", though other sizes are available for smaller room sizes.
Choosing A Pool Table Size
The game is very different on a smaller tables and larger sized tables tend to be much more challenging and enjoyable. You don't have to settle for a 7 foot "bar" table when using shorter cues could allow you to accommodate an 8 foot table.