Adjective : He looked very dapper in his new suit. ,to walk with a dapper step.    From Dictionary.com. 

All the smiling dapperness that had made him seem like a monkey to.    From Wordnik.com.  [The Ladybird] Reference

He had tucked a polka-dotted ascot into the throat of his denim work shirt, accentuating the dapperness that seemed to originate from his hair.    From Wordnik.com.  [Fierce Invalids Home From Hot Climates]

So he will never be where the fathomless manhole awaits, where the safe falls from the high window shrieking like a bomb-he is a pilot through Earth's baddest minefields, if we only stay close to him, be where he is as much as we can-yet Maximilian's doom is never to go any further into danger than its dapperness, its skin-exciting first feel.    From Wordnik.com.  [Gravity's Rainbow]

She disapproved of his toddling walk, his fat, stooped shoulders, his spats and general appearance of over-emphasized dapperness.    From Wordnik.com.  [The Man from the Bitter Roots] Reference

To them Bruce's genius was incontestably proved by the faultless evenness with which he parted his hair behind, the dapperness of his boots, and the merit of his spotless shirts.    From Wordnik.com.  [Julian Home] Reference

Setting aside a certain dapperness of carriage, which may be termed deskism for want of a better word, the manner of these persons seemed to me an exact fac-simile of what had been the perfection of bon ton about twelve or eighteen months before.    From Wordnik.com.  [The Works of Edgar Allan Poe — Volume 5] Reference

The movement's love affair with a time that was not always kind to women or minorities, and that rigidly defined men - as the hard-drinking, womanizing "Mad Men" character Don Draper, for all his dapperness, showcases - has some social observers concerned.    From Wordnik.com.  [The Seattle Times] Reference

So she was quite calm when the Marchbanks party came upon the ground, and Archie Mucklegrand, with white trousers and a lavender tie, and the trim, waxed moustache, looking very handsome in spite of his dapperness, found her out in the first two minutes, and attached himself to her forthwith in a most undetachable and determined manner, which was his way of being irresistible.    From Wordnik.com.  [Real Folks] Reference

'Bodsy Bowers,' by reason of his dapperness.    From Wordnik.com.  [Life of Lord Byron]