thinness

(noun) relatively small dimension through an object as opposed to its length or width. Synonyms: tenuity, slenderness. Examples: "The tenuity of a hair." "The thinness of a rope."

(noun) the property of having little body fat. Synonyms: leanness, spareness.

(noun) the property of being very narrow or thin. Synonyms: fineness. Example: "He marvelled at the fineness of her hair."

(noun) the property of being scanty or scattered; lacking denseness. Synonyms: sparseness, spareness, sparsity.

(noun) a consistency of low viscosity. Example: "He disliked the thinness of the soup."