narrowness
noun
[ ˈnarəʊnəs ]
• small width in relation to length.
• "the narrowness of the tunnels deters many from entering"
• limited extent, amount, or scope.
• "education has to compensate for the narrowness of local horizons"
• the fact of a victory being achieved with only a small margin.
• "the narrowness of the vote shows there is everything to fight for"