5 x 5 (25 Squares)
Five is the symbol of the five elements (Pancha Mahabhutas) and is a number that is important in lunar reckoning. A square of 5 x 5 = 25.
If one takes a triangle with sides 5, 8 and 9 one arrives at a Pythagorean Triangle. The squares of those sides are 25, 64 amd 81 respectively. Multplied together this produces 25, 920 which is the number of years in the precession of the equinoxes.