I claim the ornamental design for a combination square dining table and chairs, as shown and described.
FIG. 1 is a perspective view of my combination square dining table and chairs;
FIG. 2 is a top view thereof;
FIG. 3 is a side view thereof;
FIG. 4 is an enlarged view depicting the surface design as shown in the called out encircled area 4 of FIG. 3;
FIG. 5 is a front perspective view of a chair thereof with the chair removed for ease of illustration;
FIG. 6 is a rear perspective view of a chair thereof with the chair removed for ease of illustration;
FIG. 7 is a top view of a chair thereof with the chair removed for ease of illustration; and,
FIG. 8 is a rear elevational view of a chair thereof with the chair removed for ease of illustration.
The broken lines are for environmental purposes only and form no part of the claimed design. The crisscross pattern of lines in the drawings represent material that is understood to be distributed uniformly over the surface of the chairs and table.