I have a 54 inch round table in a 9x9 dining room so I think you would want a 48 inch.

You usually want 3ft, of space to walk around the table.

A design book I have recommends the following dimensions:

• 24" of table width for each diner with an area 2 ft sq.
• 32" for chairs plus access thereto
• 38" for chairs plus access and passage
• 42" for serving from behind chair
• 24" for passage only

By my calculation, you could have a 48" x 72" table for six persons perpendicular to and against the long wall.

• Length: 24" + 24" + 24" = 72"
• Width: Max 117"* - 32" - 32" = 53" rounded down to 48"

*room length

IMO the room is too small in the short direction to have a round table any bigger than 36” and that would be a tight fit. I would look a corbusier table which is long and narrow you could have it against the long wall and still seat5 people comfortably and in a pich pull out and seat 8

The closing is in a week and I will take all your responses into consideration. I really appreciate the speed and thoroughness of your answers!