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Length of an A4 page
29.7cm
Width of a standard doorway
90cm
Length of a standard school ruler
30cm
Typical height of a classroom desk
75cm
Width of a smartphone screen
7cm
Height of a standard chair seat from the ground
45cm
Length of a typical pencil
19cm
Width of a brick
10cm
Height of a light switch from the floor
1.2m
Length of a football (AFL) field
160m average
Height of a basketball hoop from the ground
3.05m
Length of a soccer field
105m
Distance of a 10-minute walk (approximate)
900m
Average width of a human hair
0.1mm
Height of a single-story house
4.5m
Standard length of an Olympic swimming pool
50m
Height of a giraffe (adult male)
5.5m
Typical length of a full-sized car
4.5m
Average wingspan of a bald eagle
2.3m
Distance between Melbourne and Sydney
878 km
Deepest part of the Mariana Trench (Challenger Deep)
10.9km
Circumference of the Earth at the equator
40,075 km
Length of a blue whale (largest recorded)
33m
Height of Mount Everest
8.84km
Length of the Great Wall of China
21,196 km