681.0 centimeters is equivalent to 267.72 inches.
Some known objects of similar size that are around 267 inches long include:
1. An average-sized sedan car, which can range from 175-200 inches long.
2. A standard pool cue, which is typically 58 inches long.
3. A standard adult minivan, which can range from 190-205 inches long.
4. An average-size bench press bar, which is 84 inches long.
5. A regulation-sized pool table, which is 114 inches long.
Overall, 681.0 centimeters is a little over 2 inches longer than the length of an average-sized sedan car and a little under 1 inch shorter than the length of a regulation-sized pool table. It is also more than 3 feet longer than a standard pool cue and a little shorter than an average adult minivan.