Diameter of a regulation dartboard

Diameter of a regulation dartboard (451 mm)

/fact/diameter-of-a-regulation-dartboard

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Neat Ratios ...

Diameter of a regulation dartboard (451 mm)

is 1/2000 of Height of the Tres Hermanas waterall in Peru (914 m)...more
is 1/500 of Height of the Hoover dam wall (221.4 m)...more
is 1/400 of Height of the Space Needle in Seattle (184 m)...more
is 1/250 of Height of St Paul's Cathedral in London (111 m)...more
is 1/250 of Length of the Saturn V Apollo Program launch rocket (110.6 m)...more
is 1/50 of Height of an All-Terrain Armored Transport (AT-AT) in Star Wars movies (22.5 m)...more
is 1/40 of Length of a ten pin bowling lane (18.29 m)...more
is 1/40 of Men's World Triple Jump record (18.29 m)...more
is 1/40 of Men's Olympic Triple Jump record (18.09 m)...more
is 1/40 of Length of a London Underground carriage (18 m)...more
is 1/40 of Height of the US Presidents' heads carved into Mount Rushmore (18 m)...more
is 1/25 of Length of a London bus (11.23 m)...more
is 1/20 of Men's World Long Jump Record (1991) (8.95 m)...more
is 1/20 of Men's Olympic Long Jump record (8.9 m)...more
is 1/10 of Length of a typical Great White Shark (4.6 m)...more
is 1/10 of Length overall of a `Finn` racing dinghy (4.5 m)...more
is 1/10 of Length of a Jaguar E-type coupe (4.43 m)...more
is 1/4 of Width of a ice-hockey goal (1.8 m)...more

If this was a standard unit ...