688.17 centimeters is equivalent to 270.855118 inches.
Comparisons:
1. The average height of a giraffe is between 190-260 centimeters, so 688.17 centimeters is taller than a giraffe.
2. A standard single mattress is typically around 190.5 centimeters, so 688.17 centimeters is significantly longer than a mattress.
3. The wingspan of a bald eagle can range from 1.7-2.3 meters, which is similar to 688.17 centimeters.
4. An average adult human height is around 165 centimeters, so 688.17 centimeters is more than four times taller than the average person.