How wide is the average shoulder width for a average male and an average female?

The average man in the United States is 5-foot 10-inches tall(1.78m), and weighs 172 pounds(78kg). His shoulder width is 18-1/4 inches. (46+cm)

Using that as a starting number, if your shoulder width is approximately 18-1/4 inches . . . then, your shoulder width is AVERAGE or NORMAL.

A little bit goes a long way in shoulder width . . . 20-inch-wide shoulders look significantly broader than average shoulders; 21-inch shoulders will get plenty of attention; 22-inch shoulders will draw stares from almost everyone; 23-inch shoulders are super heroic and will get you a ticket on the front row of Mr. Olympia contests; a

nd 24-inch shoulders are as rare as a 500-pound overhead press.