It's about one-tenth as big as a Hot Air Balloon.
In other words, the size of a Hot Air Balloon is 10 times 921 hogsheads.(four-person capacity; envelope volume; average)
The average volume of a hot air balloon sufficient to lift four adults is 9,200 hogsheads. Typically made of nylon or dacron, a balloon envelope of this size typically weighs just 88 kg (190 lbs).
It's about one-tenth as big as an Olympic Swimming Pool.
In other words, the size of an Olympic Swimming Pool is 11 times 921 hogsheads.(FINA regulation; (minimum capacity)
According to the Fédération Internationale de Natation (FINA), a swimming pool for Olympic and world championship events must measure 50 m by 25 m with a depth of at least 2 m for a total volume of 10,000 hogsheads. A pool of this size was to be used in Olympic time trials in New Jersey in early 2008, but its component pieces were stolen from a warehouse, likely to be sold for scrap metal.
It's about twenty times as big as a Concrete Mixer Truck.
In other words, the size of a Concrete Mixer Truck is 0.05 times 921 hogsheads.(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)
A concrete mixer truck has a drum volume of up to 46 hogsheads. Concrete mixer trucks can be in transit for about 90 minutes before the concrete dries — if the concrete dries while in the drum, jackhammers or even dynamite must be used to remove it.
It's about one-twenty-fifth as big as The Goodyear Blimp.
In other words, the size of The Goodyear Blimp is 26.1 times 921 hogsheads.(for GZ-20A) The Goodyear GZ-20 model Blimp measures 24,100 hogsheads in total volume. A December, 1929 college football game between the University of Florida Gators and the University of Oregon Webfoots (later the University of Oregon Ducks) began with the blimp dropping a parachute-equipped ball from a height of 61 m (200 ft) to the field below.
It's about one-one-hundredth as big as The Lincoln Memorial Reflecting Pool.
In other words, 921 hogsheads is 0.00858 times the size of The Lincoln Memorial Reflecting Pool, and the size of The Lincoln Memorial Reflecting Pool is 117 times that amount.(Washington, D.C.)
The Lincoln Memorial Reflecting Pool holds approximately 107,000 hogsheads of water. The Pool has a sloping bottom and extends to 80 cm (30 in) deep in its center.
It's about one-one-hundred-fiftieth as big as The Capitol Rotunda (US).
In other words, the size of The Capitol Rotunda (US) is 170 times 921 hogsheads.(formally United States Capitol rotunda) (Washington, D. C.) (total chamber volume)
The Capitol rotunda measures 160,000 hogsheads 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 one-three-hundredth as big as Spaceship Earth (EPCOT Center).
In other words, 921 hogsheads is 0.0035 times the size of Spaceship Earth (EPCOT Center), and the size of Spaceship Earth (EPCOT Center) is 290 times that amount.(a.k.a. EPCOT Center) (Walt Disney World Resort, Lake Buena Vista and Bay Lake, Florida) (total structure volume)
Spaceship Earth, the iconic structure at the heart of Walt Disney World Resort's Epcot (formerly EPCOT Center), has a total volume of 260,000 hogsheads. The outer structure of the sphere features a gutter system that channels all rainwater into nearby World Showcase Lagoon instead of simply falling off the surface of the sphere.