As a general guideline it is preferable to have a minimum of two feet around each side of the coffee table and it should be reachable, without standing, from each of the seating areas. Some people also suggest that your coffee table should be no larger than sixty percent of your sofas length. The height that you choose very much depends on what you intend to use it for. Modern coffee tables are often very low; however this may make using it for eating difficult. It is often a good idea to place an item of a similar size and shape to any table that you intend to buy in the room. This will give you a feel for how it will work with the space that you have.