It's about three-tenths as big as a Hot Air Balloon.
In other words, 974 perches is 0.31 times the size of a Hot Air Balloon, and the size of a Hot Air Balloon is 3.2 times that amount.(four-person capacity; envelope volume; average)
The average volume of a hot air balloon sufficient to lift four adults is 3,100 perches. Typically made of nylon or dacron, a balloon envelope of this size typically weighs just 88 kg (190 lbs).
It's about one-fourth as big as an Olympic Swimming Pool.
In other words, 974 perches is 0.27 times the size of an Olympic Swimming Pool, and the size of an Olympic Swimming Pool is 3.7 times that amount.(FINA regulation; (minimum capacity)
It's about one-tenth as big as The Goodyear Blimp.
In other words, 974 perches is 0.119 times the size of The Goodyear Blimp, and the size of The Goodyear Blimp is 8.4 times that amount.
It's about one-thirty-fifth as big as The Lincoln Memorial Reflecting Pool.
It's about one-fifty-fifth as big as The Capitol Rotunda (US).
In other words, the size of The Capitol Rotunda (US) is 56 times 974 perches.(formally United States Capitol rotunda) (Washington, D. C.) (total chamber volume)
The Capitol rotunda measures 53,000 perches in total volume. Beneath the Capitol lies a crypt that was built to hold the remains of President George Washington, but according to his wishes, Washington was entered at his family home and the crypt remains empty.
It's about 60 times as big as a Concrete Mixer Truck.
In other words, 974 perches is 62 times the size of a Concrete Mixer Truck, and the size of a Concrete Mixer Truck is 0.016 times that amount.(a.k.a. cement mixer, a.k.a. cement mixer truck, a.k.a. cement transport truck, a.k.a. concrete mixer, a.k.a. concrete transport truck, a.k.a. in-transit mixer)(standard size; drum capacity)
It's about one-ninetieth as big as Spaceship Earth (EPCOT Center).
In other words, the size of Spaceship Earth (EPCOT Center) is 91 times 974 perches.(a.k.a. EPCOT Center) (Walt Disney World Resort, Lake Buena Vista and Bay Lake, Florida) (total structure volume)