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A person is about 5.58 ft (1.7 m) tall, while a dolphin is about 8.53 ft (2.6 m) long. This means the dolphin is about 1.53 times the size of the person. You can visualize the difference by comparing the dolphin's 8.53 ft (2.6 m) length against the person's 5.58 ft (1.7 m) height.

How much space each takes up
Dolphin is about 1.53 times the size of person.
Typical adult or standard sizes; real ones vary.