How big is 100 cm squared?

100 square centimeters (cm²) is a measure of area. It represents a square that is 10 cm on each side, as the area of a square is calculated by squaring the length of one of its sides (10 cm x 10 cm = 100 cm²). This area is roughly equivalent to the size of a standard piece of paper, such as A4, which has an area of about 620 cm².