perfect
neat

cut sth into, divide sth into
Cut the sandwiches into neat squares.

square of
A square of light shone from the skylight.

central, main
public
city, town, village
market
crowds in the market square

fill, throng (esp. BrE)
The crowd filled the square.

in a/the square

the centre/center of the square, the middle of the square, the side of the square
the east side of the square