Why chess board has 64 squares?

Why chess board has 64 squares? 64 is a whole square, so that it is as wide as it is long. It happens that it is also THE MOST suitable option for a chess game, because: It is big enough to allow multiple maneuvers and strategical possibilities. It is small enough to let general guidelines be formed.

64 is a whole square, so that it is as wide as it is long. It happens that it is also THE MOST suitable option for a chess game, because: It is big enough to allow multiple maneuvers and strategical possibilities. It is small enough to let general guidelines be formed.