53.45 cm = 21.0236220472 in
This length is equivalent to roughly two-thirds of a standard school ruler (30 cm), slightly less than the length of a standard adult hand (approximately 22 cm), and slightly more than the length of a dollar bill (15.24 cm). It is also close in length to a standard laptop computer (12-14 inches) and slightly shorter than a standard sheet of paper (8.5 x 11 inches).