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Webster 1913 Edition

Noun.

The quality or state of being trim; orderliness; compactness; snugness; neatness.

Noun.

Neatness; snugness; the state of being close and in good order.

trimness ‎(usually uncountable, plural trimnesses)

The property of being trim.
The lawn's trimness impressed the home and garden award committee.

- 1749, John Cleland, Fanny Hill: Memoirs of a Woman of Pleasure, Part 4
  The silky hair that covered round the borders, now smooth'd and re-pruned, had resumed its wonted curl and trimness; the fleshy pouting lips that had stood the brunt of the engagement, were no longer swollen or moisture-drenched