Comfort distances
A sofa seat needs about 60 to 70 cm of length per person. A coffee table usually sits about 40 to 45 cm from the front of the sofa and is about two thirds of the sofa's length.
Leave 80 to 90 cm for a main walkway through a room. At a dining table allow 60 cm of table edge per diner; a table 90 to 110 cm wide lets two people sit face to face. From the table edge to the wall leave 75 cm so a chair can pull back, or 90 cm so someone can walk behind a seated diner.
These are common rules of thumb, not guarantees.




