It's about 450,000 times as tall as The Hollywood Sign
In other words, 6,400 kilometers is 430,000 times the height of The Hollywood Sign, and the height of The Hollywood Sign is 0.0000023 times that amount.(a.k.a. Hollywoodland Sign) (Mount Lee, Hollywood Hills, Santa Monica Mountains, California)
Each of the white letters in the Hollywood Sign measures 0.015 kilometers tall. Built as an advertisement in 1923, the sign was intended to stand for only eighteen months.
It's about 450,000 times as long as a Semitrailer
In other words, 6,400 kilometers is 437,500 times the length of a Semitrailer, and the length of a Semitrailer is 0.000002286 times that amount.(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)
According to the United States Department of Transportation (DOT), the maximum allowable length of a semitrailer pulled by a road tractor truck is 0.01463 kilometers (unless superseded by state law). These regulations also allow the vehicles to tow up to 36,000 kg in gross weight.
It's about 500,000 times as tall as a Brachiosaurus
In other words, 6,400 kilometers is 490,000 times the height of a Brachiosaurus, and the height of a Brachiosaurus is 0.0000020 times that amount.(based on comparable bone measurements, height to head)
Dinosaurs in the genus Brachiosaurus had an estimated height (at the head with neck fully extended) of up to 0.013 kilometers. A resin cast of the first Brachiosaurus specimen, owned by the Field Museum in Chicago, is currently on display at the O'Hare International Airport.
It's about 600,000 times as tall as a Telephone Pole
In other words, 6,400 kilometers is 580,000 times the height of a Telephone Pole, and the height of a Telephone Pole is 0.0000017 times that amount.(a.k.a. Utility Pole, a.k.a Power Pole, a.k.a. Telegraph Pole, a.k.a. Telegraph Post, a.k.a. Hydro Pole) (exposed height; per Florida Public Service Commission average)
A standard telephone pole is 0.011 kilometers tall. Despite alternatives, most telephone poles in the US are made of wood — most commonly pine — and have a lifespan of 25 to 50 years, depending on climate and preservatives applied.
It's about 750,000 times as long as a London bus
In other words, 6,400 kilometers is 764,000 times the length of a London bus, and the length of a London bus is 0.00000131 times that amount.(Routemaster Double-Decker, RM standard specification)
The Routemaster Double-Decker buses, well-known as icons of London, measure 0.00838 kilometers in length. The buses were said to be well-designed for travel in the London traffic, as they offered an open door for riders to board and exit even while the bus was moving at low speeds, and a full-time conductor to collect fares.
It's about 1,000,000 times as tall as a Giraffe
In other words, 6,400 kilometers is 1,100,000 times the height of a Giraffe, and the height of a Giraffe is 0.00000091 times that amount.(Giraffa camelopardalis) (Adult, average)
An adult giraffe may grow to be up to 0.006 kilometers tall. Adult giraffes require very little sleep, averaging just 1.9 hours per day.
It's about 1,500,000 times as long as a Beetle (Volkswagen)
In other words, 6,400 kilometers is 1,569,000 times the length of a Beetle (Volkswagen), and the length of a Beetle (Volkswagen) is 0.0000006373 times that amount.(1964 model) (a.k.a. Volkswagen 1200, a.k.a. Käfer)
A 1964 Volkswagen Beetle measures 0.004079 kilometers. As the longest continuously-produced automobile design — in production for 75 years between 1938 and 2003 — the Beetle was voted the most fourth-most influential car of the twentieth century by the Global Automotive Elections Foundation.