After my previous reply I wanted to be certain of my figures, so here is an excerpt from Wikipedia for the Harry S. Truman:
Description Harry Truman (also known as HST within the Navy) is 1,092 ft (333 m) long, 257 ft (78 m) wide and is as high as a twenty-four-story building, at 244 feet (74 m). The super carrier can accommodate approximately 80 aircraft and has a flight deck 4.5 acres (1.8 ha) in size, using four elevators that are 3,880 ft² (360 m²) each to move planes between the flight deck and the hangar bay. With a combat load, HST displaces almost 97,000 tons and can accommodate 6,250 crewmembers.
Ok. Maybe 150 tons displacement is not as large as I thought, but it would put it bigger than the Santa Maria, and would equate to a small medium cargo ship from Rennaissance Europe.