421.71 centimeters is equivalent to approximately 166.18 inches.
This length can be compared to the height of a standard door, which is typically around 80 inches. This means that 421.71 centimeters is more than twice the height of a door.
It is also similar to the length of a standard twin-size bed, which is typically 75 inches long. This means that 421.71 centimeters is slightly longer than the length of a twin-size bed.
In addition, 421.71 centimeters is almost the same length as a standard pool cue, which is typically around 57 inches long. This means that 421.71 centimeters is just over two and a half times the length of a pool cue.