If Number of skyscrapers in Chicago (>150m tall) (118 ) was a standard unit ...

Number of US Military deaths in the Vietnam war (58,200 )...more would be 500 x Number of skyscrapers in Chicago (>150m tall)

High estimate of world population of Spotted Hyena (47,000 individuals)...more would be 400 x Number of skyscrapers in Chicago (>150m tall)

Number of seats in Lord's Cricket Ground (30,000 )...more would be 250 x Number of skyscrapers in Chicago (>150m tall)

Estimated world population of Alpine Ibex (30,000 individuals)...more would be 250 x Number of skyscrapers in Chicago (>150m tall)

Pop. of Gibraltar (29,580)...more would be 250 x Number of skyscrapers in Chicago (>150m tall)

High estimate of number of Eastern Gorillas (5,880 individuals)...more would be 50 x Number of skyscrapers in Chicago (>150m tall)

Estimated world population of Snow Leopard (3,000 individuals)...more would be 25 x Number of skyscrapers in Chicago (>150m tall)

Estimated population of Bengal Tigers (3,000 individuals)...more would be 25 x Number of skyscrapers in Chicago (>150m tall)

Pop. of Svalbard (2,926)...more would be 25 x Number of skyscrapers in Chicago (>150m tall)

Number of seats in London's Olivier Theatre (1,160 )...more would be 10 x Number of skyscrapers in Chicago (>150m tall)

Estimated world population of African Wild Ass (600 individuals)...more would be 5 x Number of skyscrapers in Chicago (>150m tall)

Number of skyscrapers in New York City (>150m tall) (300 )...more would be 2.5 x Number of skyscrapers in Chicago (>150m tall)

Estimated population of Red Wolf (USA) (300 individuals)...more would be 2.5 x Number of skyscrapers in Chicago (>150m tall)

Number of Annual average of deaths due to assault in the United Kingdom 2013-2018 (290 )...more would be 2.5 x Number of skyscrapers in Chicago (>150m tall)

Number of skyscrapers in Dubai (>150m tall) (236 )...more would be 2 x Number of skyscrapers in Chicago (>150m tall)

Number of ways of seating six people around a table (120 )...more would be about as big as Number of skyscrapers in Chicago (>150m tall)

Number of stories in the Canterbury Tales by Chaucer (24 )...more would be 1/5 of Number of skyscrapers in Chicago (>150m tall)

Is That A Big Number? - The Book

Yes, there's now a book based on these numbers. Oxford University Press: July 2018.