We want to say depends, but we consider it a lazy and indecisive answer. Generally, furniture stores offered you 120cm, 160m, 180cm, and 200cm onwards.
Now the more detailed question would be “Which size fits your family members?”
120cm long: 2-4 people with small to medium body sizes. The reason being the table legs might get in the way for bigger than medium size person to sit.
160m - 180cm long: 4-6 people fits well using all the sides, 160cm for the small to medium body range, while 180cm can fit better for bigger body size.
180cm -220cm long: 4-8 can easily fit using all the sides, 180cm for the small to medium body range, while 200cm will fit better for bigger body sizes.
240cm long onwards: 8-10 people can start fit comfortably well.
EASY AS what Kiwis would say :)