At the back of the sink or toilet, the ceiling height can be as low as 60 inches. Vanity and sink heights have no requirements for height; the recommendation is that they fit the height of the user, ranging from 32 to 43 inches.
This year's edition of the World Urban Areas Report covers more than a thousand of the largest cities in the world, from Tokyo (pop. 37,000,000), right down to tiddlers like 850th-ranked Leicester (Pop. 534,000): all 1,009 cities, in fact, with a population of half a million of more. Here are the top 10.
According to the latest U.N. estimate last year, the world's population is expected to rise from 6.7 billion in 2007 to 9.2 billion in 2050. Over the same span, the new report said, the total population of urban areas is projected to rise from 3.3 billion to 6.4 billion.