Height is the same as length, but measured vertically. Heights can be
measured in centimetres, metres and kilometres. And from length we get
speed, which is length per unit time, e.g. kilometres per hour. Click
here for speed info page.
Here are some examples of items and
their lengths/heights shown in metric units; at least some of these
things you have probably encountered, the metric dimensions will help
provide a feel for such sizes as 90 mm or 100 metres:

Floppy disk: 90 mm / 9 cm 

Compact disc: 120 mm 

Credit card: 85.5 × 54 × 0.8 mm 

Matchstick: 2 mm wide 

Football pitch (soccer): 100 metres long
Every fullsized soccer pitch must be between 91119 metres long,
and between 4691 metres wide. 

Average computer monitor, viewable screen size measured
diagonally, on CRT monitor: 41 cm
(Tube size is larger) 



Height of the Eiffel Tower: 300 metres 

Original height of the Great Pyramid of Giza: 147 metres 

Height of the Empire State Building: 448 metres 

Height of average British man:176 centimetres 

Height of average British woman: 162 centimetres 

Average length of new born baby: 50 centimetres 

London doubledecker routemaster bus: approx 8.4 metres long,
4.4 metres high, 2.4 metres wide.
Modern London buses vary considerably in length, height and design. 
United Kingdom coins:
£1 coin
Diameter: 22.5 mm
Thickness: 3.15 mm
Mass: 9.5 g 
£2 coin
Diameter: 28.4 mm
Thickness: 2.50 mm
Mass: 12 g 
50 pence coin
Diameter: 27.3 mm
Thickness: 1.78 mm
Mass: 8.0 g 
20 pence coin
Diameter: 21.4 mm
Thickness: 1.7 mm
Mass: 5.0 g 
10 pence coin
Diameter: 24.5 mm
Thickness: 1.78 mm
Mass: 6.5 g 
5 pence coin
Diameter: 18.0 mm
Thickness: 1.0 mm
Mass: 3.25 g 
(coin images and data from the Royal
Mint website)





If you are interested in the smaller sizes, have a look at the interactive
animation at http://www.cellsalive.com/howbig.htm which
will even show you nanometres.
Distance
Distances between cities, for runs, marathons, and longer distances
can be measured using kilometres. As we see above, one kilometre is 1000
metres in length.
Some distances in kilometres
Location from/to 
Distance 
Notes 
Circumference of the Earth through the poles 
40 000 km 
This is what the metre was originally based on, but
due to slight inaccuracies the exact distance is slightly different
(actual length varies according to which website you look at). 
Circumference of the Earth around the Equator 
40 075 km 
Distance around the Equator is slightly more due to
the bulging of the Earth 
Length of Great Britain 
1000 km 
One tenth of the distance from the North Pole to the Equator 
Length of coastland of Great Britain (mainland only) 
17 819 km 

National Grid squares 
100 km by 100 km 
Ordnance Survey in the UK produces all the official maps of the
country, and divides the country into 91 grid squares, each with
two letters, and covering a distance of 100 km on each side of the
square. Using this grid and its subdivisions, any place in the UK
can be described using its grid reference. More info
The grid is divided smaller into 10 km and 1 km grid squares.
The OS has been using this metric grid since the mid 1940s. 
Astronomical Unit 
149 000 000 km 
The average distance between the Earth and the Sun,
149 million kilometres. 
Light Year 
9 460 000 000 000 km 
The distance travelled by light in one year, 9 trillion
460 billion kilometres. 
Minimum height of a mountain in England, Wales, Ireland 
610 metres 
This is the definition of what constitues a mountain.
If it is smaller than this height, it is not a mountain. Scotland
has different classifications. 
Typical altitude of airliner 
11 km 

The edge of space 
100 km 
The Ansari
X Prize recently was won by SpaceShip One
when it reached the edge of space twice. 
Distance to the Moon 
From 356 371 km to 406 720 km 
The Moon's orbit is elliptical so the distance varies 
Marathon 
42.195 km 
The official marathon length, however some running races
called marathons may be different distances, such as 40 km, 50 km,
and is estimated to have been originally 34.5 km in ancient Greece. 
UK distances 
Measured as a straight line, not road distances 
Road distance using most likely route 
LondonManchester 
263 km 
325 km 
LondonEdinburgh 
534 km 
663 km 
LondonYork 
280 km 
340 km 
LondonNewcastle 
398 km 
459 km 
ManchesterEdinburgh 
281 km 
359 km 
Total length of motorways in Great
Britain (more
info) 
4353 km 
Total length of A roads in Great Britain 
48 164 km 
Total length of B roads in Great Britain 
30 216 km 
