Numbers from

... and for similar facts about other numbers see Numbers: Facts, Figures & Fiction.
Website copyright © Richard Phillips 1994/2003.
= 2 x 2 x 2 x 2
A fourth power.
= 4 x 4
A square.
= 2 x 8
= 1 + 3 + 5 + 7
There are 16 ounces in a pound.
Sixteenmo is the size of a book made by folding each sheet of paper into 16 leaves.
In biology, if a cell divides itself in half every 30 minutes, you will have 16 cells in 2 hours.
16 pieces are used by each player in a game of chess.
Caterpillars typically have 16 legs. But when they emerge from their chrysalis as a butterfly or moth, they have only six legs.
Under British law, when you reach the age of 16 
16 as a 4 by 4 square.
This compass rose is divided into 16 points: north, northnortheast, northeast, eastnortheast, east ... and so on. Old maps and charts often included a rose like this to show the compass directions.
16 pebbles feature in Samuel Becket's novel Molloy which has one of the longest and most detailed accounts of someone working at a mathematical problem in a work of fiction 
I took advantage of being at the seaside to lay in a store of suckingstones. They were pebbles but I call them stones. Yes, on this occasion I laid in a considerable store. I distributed them equally between my four pockets, and sucked them turn and turn about. This raised a problem...
The following six pages of the novel describe different solutions to the problem of ensuring all 16 pebbles are sucked equally often.
16 chocolates packed as 2 by 2 by 4.