How long is 622 nails?
It's about four-fifths as long as Ha'Penny Bridge

The length of Ha'Penny Bridge is about 751 nails.
(a.k.a. Droichead na Leathphingine, a.k.a. Liffey Bridge, a.k.a. Droichead na Life, f.k.a. Wellington Bridge) (Quay of Bachelors Walk, Temple Bar Neighborhood, Dublin, Ireland)
It's about one-and-three-tenths times as long as Baseball base distances
The length of Baseball base distances is about 480 nails.
(MLB Official Baseball Rules specification)
It's about three-fourths as tall as The Chicago Water Tower

The height of The Chicago Water Tower is about 821 nails.
(Chicago, Illinois)
It's about three-fourths as tall as The Arc de Triomphe

The height of The Arc de Triomphe is about 860 nails.
(Paris, France)
It's about seven-tenths as tall as Nelson's Column

The height of Nelson's Column is about 903.60 nails.
(London, England, United Kingdom) (from pedestal first step to tip of statue's hat)
It's about two-thirds as tall as The Mahabodhi Temple

The height of The Mahabodhi Temple is about 960 nails.
(a.k.a. Great Awakening Temple, a.k.a. Maha Bodhi Temple, a.k.a. Temple of Bodh Gaya, a.k.a. Mahabodhi Mahavihar) (Bodh Gaya, Gaya District, Bihar, India)
It's about three-fifths as tall as The Leaning Tower of Pisa

The height of The Leaning Tower of Pisa is about 987 nails.
(a.k.a. The Tower of Pisa, a.k.a. Torre pendente di Pisa) (Pisa, Italy) (height along center axis)
It's about three-fifths as tall as The Cinderella Castle

The height of The Cinderella Castle is about 1,010 nails.
(Fantasyland, Magic Kingdom, Walt Disney World, Lake Buena Vista and Bay Lake, Florida)
It's about one-and-three-fourths times as long as a Cricket Pitch
The length of a Cricket Pitch is about 352 nails.
(per Marylebone Cricket Council / International Cricket Council Law #6)
It's about one-and-nine-tenths times as long as a Bowling Lane
The length of a Bowling Lane is about 335.190 nails.
(USBC specifications; tenpin; including pin deck)
It's about half as wide as The Wingspan of a 747
The width of The Wingspan of a 747 is about 1,200 nails.
(a.k.a. Boeing 747, a.k.a. Jumbo Jet, a.k.a. Queen of the Skies) (for Boeing 747-8 series)
It's about half as tall as a Giant Sequoia (tree)
The height of a Giant Sequoia (tree) is about 1,300 nails.
(a.k.a. Sequoiadendron giganteum, a.k.a. Sierra redwood, a.k.a. Wellingtonia)
It's about two-and-a-half times as tall as The Hollywood Sign

The height of The Hollywood Sign is about 260 nails.
(a.k.a. Hollywoodland Sign) (Mount Lee, Hollywood Hills, Santa Monica Mountains, California)
It's about two-and-a-half times as long as a Semitrailer
The length of a Semitrailer is about 256 nails.
(a.k.a. semi-trailer truck, a.k.a. semi, a.k.a. tractor-trailer, a.k.a. truck and trailer, a.k.a. eighteen-wheeler, a.k.a. big rig, a.k.a. Mack truck, a.k.a. transport, a.k.a. lorry, a.k.a. artic; for box truck; United States Federal length limits)
It's about two-fifths as tall as The Statue of Liberty

The height of The Statue of Liberty is about 1,627 nails.
(a.k.a. "Liberty Enlightening the World," a.k.a. La Liberté Éclairant le Monde) (Liberty Island, New York City, New York) (pedestal base to torch peak)