Callaway Golf Co manufactures golf clubs. It sells its line of Big Bertha, Great Big Bertha, and Biggest Big Bertha oversize metal woods and conventional-style metal woods, irons, wedges, and putters. These clubs, as well as those marketed under other trademarks, are sold at premium prices through retailers of professional-quality golf clubs in the United States and overseas. Sales of metal woods account for approximately 60% of the company's total sales. Foreign sales account for about 45% of Callaway Golf's total sales.