In UK the best dressed person is the person who wears a traditional dress during the time it was reviewed Proper English traditional Frock and leggings are classed as dress it could be knee length or full ankle length or in Indians dress code of Shlawar kameez etc are classed as the proper dress. As the best dressed person the cut, Sewing, Style of wearing and suitability are the main factors of judging. Not half naked and bodies waiting for a chance to peel of what little they have on. As for Swimming costume they are not dresses. You don%u2019t see some one walking in the street in Swimming costume.