If World record longest flight of an arrow from a bow (2010) (484 m) was a standard unit ...
Diameter of Mercury (4,880 km)...more would be 10000 x World record longest flight of an arrow from a bow (2010)
Length of I-90 highway from Boston to Seattle (4,860 km)...more would be 10000 x World record longest flight of an arrow from a bow (2010)
Diameter of Pluto (2,377 km)...more would be 5000 x World record longest flight of an arrow from a bow (2010)
Length of the Tigris River (1,950 km)...more would be 4000 x World record longest flight of an arrow from a bow (2010)
Length of the Rhine River (1,233 km)...more would be 2500 x World record longest flight of an arrow from a bow (2010)
Direct distance from Land's End to John o' Groats (970 km)...more would be 2000 x World record longest flight of an arrow from a bow (2010)
Length of the Suez Canal (193.3 km)...more would be 400 x World record longest flight of an arrow from a bow (2010)
Diameter of the (fictional) Death Star in the first Star Wars movie (120 km)...more would be 250 x World record longest flight of an arrow from a bow (2010)
Length of the Kiel Canal (98 km)...more would be 200 x World record longest flight of an arrow from a bow (2010)
Length of the Epsom Derby horse race (2.4 km)...more would be 5 x World record longest flight of an arrow from a bow (2010)
Length of the Champs Elysee (1.9 km)...more would be 4 x World record longest flight of an arrow from a bow (2010)
Length of Tower Bridge over the Thames (244 m)...more would be 1/2 of World record longest flight of an arrow from a bow (2010)
Height of a typical Hot Air Balloon (24 m)...more would be 1/20 of World record longest flight of an arrow from a bow (2010)
Length of a tennis court (23.77 m)...more would be 1/20 of World record longest flight of an arrow from a bow (2010)
Estimated length of Tyrannosaurus Rex (12.3 m)...more would be 1/40 of World record longest flight of an arrow from a bow (2010)
Length overall of a `49er` racing dinghy (4.88 m)...more would be 1/100 of World record longest flight of an arrow from a bow (2010)
Length of a standard bed (1.9 m)...more would be 1/250 of World record longest flight of an arrow from a bow (2010)
Length of a lightsaber in the Star Wars movies (1.19 m)...more would be 1/400 of World record longest flight of an arrow from a bow (2010)
Is That A Big Number? - The Book
Yes, there's now a book based on these numbers. Oxford University Press: July 2018.