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Eiffel Tower: 134 m
House: 9 m
Man 1.7 m
Mouse 5 cm
Ant: 6 mm
Human hair diameter: 100 μm
Red blood cell dimater: 7 μm
Bacterial cell length: 2 μm
Ribosome: 20 nm
DNA helix diameter: 2 nm
Water molecule: 100 pm
Proton: 1.6 fm