From Longman Dictionary of Contemporary Englishdapperdap‧per /ˈdæpə $ -ər/ adjective SMART/WELL-DRESSEDTIDYa man who is dapper is nicely dressed, has a neat appearance, and is usually small or thin a dapper little man in a grey suit
Examples from the Corpus
dapper• Skepticism fully loaded, I agreed to meet with the dapper and charming McKenna.• A small dapper gentleman two seats away knocked back a shot of something and exhaled an invisible sweet cloud.• Graham walked into the restaurant, looking dapper in a grey business suit.• Franklin looked dapper in his gray pin-striped suit.• The Captain was a dapper little man with a neat moustache and shiny shoes.• I tried the next time with a very dapper man, all pinstripes and umbrella.• He was a dapper man; he liked to look good.• A dapper man with an aristocratic air, he was boyishly handsome, compulsively social and intensely creative.• Rat remains his dapper, timeless self.Origin dapper (1400-1500) Middle Dutch “quick, strong” 