The hoop gained international popularity in the late 1950s when a plastic version was successfully marketed by California's Wham-O toy company. In 1957, Richard Knerr and Arthur "Spud" Melin, starting with the idea of Australian bamboo "exercise hoops", manufactured 1.06 metre (42 in) hoops with Marlex plastic. With give-aways and national marketing and retailing, a fad was started in July, 1958;twenty-five million plastic hoops were sold in less than four months, and in two years sales reached more than 100 million units.Carlon Products Corporation was one of the first manufacturers of the hula hoop. During 1950s when the hula hoop craze swept the country, Carlon was producing more than 50,000 hula hoops per day. The hoop was inducted into the National Toy Hall of Fame at The Strong in Rochester, New York, in 1999.