It's about one-fifth as tall as a Giraffe
In other words, 1,200 milimeters is 0.21 times the height of a Giraffe, and the height of a Giraffe is 4.8 times that amount.(Giraffa camelopardalis) (Adult, average)
An adult giraffe may grow to be up to 6,000 milimeters tall. Adult giraffes require very little sleep, averaging just 1.9 hours per day.
It's about one-tenth as long as a London bus
In other words, 1,200 milimeters is 0.143 times the length of a London bus, and the length of a London bus is 6.99 times that amount.(Routemaster Double-Decker, RM standard specification)
The Routemaster Double-Decker buses, well-known as icons of London, measure 8,380 milimeters 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 one-tenth as tall as a Telephone Pole
In other words, 1,200 milimeters is 0.11 times the height of a Telephone Pole, and the height of a Telephone Pole is 9.1 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 11,000 milimeters 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 one-tenth as tall as a Brachiosaurus
In other words, 1,200 milimeters is 0.09 times the height of a Brachiosaurus, and the height of a Brachiosaurus is 11 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 13,000 milimeters. 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 one-tenth as long as a Semitrailer
In other words, 1,200 milimeters is 0.0820 times the length of a Semitrailer, and the length of a Semitrailer is 12.19 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 14,630 milimeters (unless superseded by state law). These regulations also allow the vehicles to tow up to 36,000 kg in gross weight.
It's about one-fifteenth as tall as The Hollywood Sign
In other words, 1,200 milimeters is 0.1 times the height of The Hollywood Sign, and the height of The Hollywood Sign is 13 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 15,000 milimeters tall. Built as an advertisement in 1923, the sign was intended to stand for only eighteen months.
It's about one-fifteenth as long as a Bowling Lane
In other words, 1,200 milimeters is 0.06264 times the length of a Bowling Lane, and the length of a Bowling Lane is 15.963 times that amount.(USBC specifications; tenpin; including pin deck)
According to the United States Bowling Congress specifications, a tenpin bowling lane should measure 19,156 milimeters. In a Professional Bowling Association game, the lane must be lubricated by about 25 ml (0.85 fl. oz) of oil.