How long is 13 feet?
It's about one-tenth as long as Ha'Penny Bridge

The length of Ha'Penny Bridge is about 141 feet.
(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-tenth as tall as The Chicago Water Tower

The height of The Chicago Water Tower is about 154 feet.
(Chicago, Illinois)
It's about one-tenth as tall as The Arc de Triomphe

The height of The Arc de Triomphe is about 160 feet.
(Paris, France)
It's about one-fifteenth as tall as Nelson's Column

The height of Nelson's Column is about 169.40 feet.
(London, England, United Kingdom) (from pedestal first step to tip of statue's hat)
It's about one-fifteenth as tall as The Mahabodhi Temple

The height of The Mahabodhi Temple is about 180 feet.
(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 one-fifteenth as tall as The Leaning Tower of Pisa

The height of The Leaning Tower of Pisa is about 185 feet.
(a.k.a. The Tower of Pisa, a.k.a. Torre pendente di Pisa) (Pisa, Italy) (height along center axis)
It's about one-fifteenth as tall as The Cinderella Castle

The height of The Cinderella Castle is about 189 feet.
(Fantasyland, Magic Kingdom, Walt Disney World, Lake Buena Vista and Bay Lake, Florida)
It's about one-fifteenth as wide as The Wingspan of a 747
The width of The Wingspan of a 747 is about 225 feet.
(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 one-twentieth as tall as a Giant Sequoia (tree)
The height of a Giant Sequoia (tree) is about 250 feet.
(a.k.a. Sequoiadendron giganteum, a.k.a. Sierra redwood, a.k.a. Wellingtonia)
It's about one-twenty-fifth as tall as The Statue of Liberty

The height of The Statue of Liberty is about 305.10 feet.
(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)
It's about one-twenty-fifth as tall as Big Ben

The height of Big Ben is about 310 feet.
(officially the clock tower of Palace of Westminster, a.k.a. Houses of Parliament) (London, England)
It's about one-twenty-fifth as long as a Football (Soccer) Pitch
The length of a Football (Soccer) Pitch is about 344 feet.
(a.k.a. Football Field, a.k.a. Soccer Field) (field length, a.k.a. touchline distance)
It's about one-thirtieth as long as a Football field
The length of a Football field is about 360 feet.
(American) (total distance; per NFL regulation)
It's about one-thirty-fifth as tall as The Great Pyramid of Giza

The height of The Great Pyramid of Giza is about 430 feet.
(a.k.a. Pyramid of Khufu, a.k.a. Pyramid of Cheops) (Cairo, Egypt) (estimated original height)
It's about one-fortieth as long as The Shambles

The length of The Shambles is about 490 feet.
(a.k.a. Maze of Twisting, a.k.a. The Great Flesh Shambles) (York, England, United Kingdom) (approximate)