678.45 centimeters is equivalent to 267.09 inches.
This is slightly longer than the height of the average adult human, which is around 63 inches.
It is also roughly the length of a standard pool cue, which measures around 58 inches.
In terms of household objects, 678.45 centimeters is longer than a standard door, which is typically 80 inches tall, but shorter than a queen-size bed, which is usually around 80-82 inches long.