Alan Flusser wrote in 1985 that proportions dictate that a man's (single breasted - DBs take wider) jacket lapels should be slightly narrower than the width of his chest from collar to shoulder line, or about 3 1/2" (9 cm), and that his necktie whould be slightly narrower than his lapel (3 1/4" or 8 cm). The proportions of broader men require somewhat larger dimensions.
Over the years of course neckties in particular have varied in width from 2" to 5" (5 cm to 13 cm), as witnessed by then best dressed A. J. Drexel Biddle's narrow necktie and somewhat overly large lapels of fifty years ago in the photograph. And the strangeness of this look to our eyes only goes to demonstrate the point.
Keep things in proportion.