It's about half as big as a Hot Air Balloon.
In other words, the size of a Hot Air Balloon is 2 times 375 lasts.(four-person capacity; envelope volume; average)
It's about two-fifths as big as an Olympic Swimming Pool.
In other words, 375 lasts is 0.44 times the size of an Olympic Swimming Pool, and the size of an Olympic Swimming Pool is 2.3 times that amount.(FINA regulation; (minimum capacity)
It's about one-fifth as big as The Goodyear Blimp.
In other words, 375 lasts is 0.19 times the size of The Goodyear Blimp, and the size of The Goodyear Blimp is 5.26 times that amount.
It's about one-twenty-fifth as big as The Lincoln Memorial Reflecting Pool.
It's about one-thirty-fifth as big as The Capitol Rotunda (US).
In other words, the size of The Capitol Rotunda (US) is 34 times 375 lasts.(formally United States Capitol rotunda) (Washington, D. C.) (total chamber volume)
It's about one-fifty-fifth as big as Spaceship Earth (EPCOT Center).
In other words, the size of Spaceship Earth (EPCOT Center) is 56 times 375 lasts.(a.k.a. EPCOT Center) (Walt Disney World Resort, Lake Buena Vista and Bay Lake, Florida) (total structure volume)
It's about one-eightieth as big as Royal Albert Hall.
In other words, 375 lasts is 0.01259 times the size of Royal Albert Hall, and the size of Royal Albert Hall is 79.43 times that amount.(a.k.a. Royal Albert Hall of Arts and Sciences) (Westminster, London, England, United Kingdom) (total auditorium volume)
Royal Albert Hall measures 29,780 lasts in total auditorium volume. One of the centerpieces of the Hall is the Grand Organ — the second-largest organ in the United Kingdom, with 10,268 speaking pipes reaching up to 9.8 m (32 ft) in height.