Arrow numbers like this: 11/14 or 16/16 or 19/14, etc
The first two digits are the diameter of the arrow in 64ths of an inch;
The second two are the thickness of the wall of the arrow tube (modern arrows for recurve bows are tubes rather than solid sticks) in thousandths of an inch.
And one thousandth of an inch makes a difference!
Or so they say.
Recurve bows aren't the same as longbows.
someone can use that in a quiz, surely? 
Working in someone else's home
