Each person requires at least a 24 inches for eating space. This means a 4 ft diameter table will fit 6 people. That is a bit crowded though, so I would shoot for 30 inches instead. That would mean you should have 5 foot diameter table for 6 people.
Depending on the people, you need to figure about 36 inches of space per person. So a table for 24 would need to have a perimeter of 72 feet! If the table is required to be round, then a diameter of 72/pi or 23 FEET is required. Nobody has a table that's 23 feet in diameter. King Arthur's mythical Round Table may have been that size, perhaps. If it existed, it was probably toroidal (doughnut-shaped, with a hole in the center) to allow servants to put food on the table.
Check the link below for the table and seating capacities http://www.weparty.com/guides/planningguide_tableseating.pdf http://www.stuartrental.com/party-rentals/7/table-rentals FROM BUYAGAN, LA TRINIDAD ARCHITECT
Eight Feet will give each person plenty of room
The table would have to be at east ten feet in diameter.
The table in the Vienna 5 Piece Outdoor Dining Set is 29" heigh and 48" in diameter and is capable of seating several people comfortably.
There are a few different standard sizes of round dining tables depending on how many people you're planning to seat. For sitting 4 to 6 people, a round dining table should be 44 to 54 inches in diameter. If you're look to seat more people, a table with a diameter of 54 to 72 inches seats up to 8.
If the dining table diameter is 36" (900mm), a rug underneath this table should be sized so that it is large enough to be beyond the chair legs when a chair is in the pulled out position. This means it will not catch on the chair as the person seats themselves and pulls the chair in. A rug that extends at least 48" (1200mm) beyond each side of the table would be required. This gives a total diameter for the rug of at least 130" (3300mm).
A dining table is a table where people usually gather to have meals. Usually a large table.
A dining table pad is used to protect the dining table surface from spills and scratches. Dining table pads can also add fashion to your dining room.
Criteria for dining table
a dining table is usally in grams .
A 6 foot dining room table is large enough to make four people using comfortable and it is not so expensive.