Length of a Penguin paperback book

Length of a Penguin paperback book (181 mm)

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Neat Ratios ...

Length of a Penguin paperback book (181 mm)

is 1/5000 of Height of the Tres Hermanas waterall in Peru (914 m)...more
is 1/1000 of Height of the Space Needle in Seattle (184 m)...more
is 1/400 of Height of the Taj Mahal in Agra, India (73 m)...more
is 1/400 of Length of the Great Sphinx of Giza (73 m)...more
is 1/400 of Overall length of an Airbus A380 (72.7 m)...more
is 1/400 of Length of the SpaceX Falcon 9 launch rocket (71 m)...more
is 1/100 of Length of a baseball pitch, pitcher to batter (18.44 m)...more
is 1/100 of Length of a ten pin bowling lane (18.29 m)...more
is 1/100 of Men's World Triple Jump record (18.29 m)...more
is 1/100 of Men's Olympic Triple Jump record (18.09 m)...more
is 1/100 of Length of a London Underground carriage (18 m)...more
is 1/100 of Height of the US Presidents' heads carved into Mount Rushmore (18 m)...more
is 1/50 of Men's World Long Jump Record (1991) (8.95 m)...more
is 1/50 of Men's Olympic Long Jump record (8.9 m)...more
is 1/40 of Width of a football goal (7.32 m)...more
is 1/25 of Length of a classic Ford Mustang (first generation) car (4.61 m)...more
is 1/25 of Length of a typical Great White Shark (4.6 m)...more
is 1/25 of Length overall of a `Finn` racing dinghy (4.5 m)...more
is 1/20 of Length of a standard full size snooker table (3.57 m)...more
is 1/10 of Width of a ice-hockey goal (1.8 m)...more
is 2/5 of Diameter of a regulation dartboard (451 mm)...more

If this was a standard unit ...