Among Hong Kong's traditional tailors there is one who has dumped his tape measure and swapped it for a 3D body scanner that can take more than 120 body measurements in less than 10 seconds. Customers are asked to wear a tight-fitting tank top and step inside a changing room equipped with 14 infrared sensors - eight in the front and six at the back.The data, including not just measurements of length and circumference, but also angles, is instantaneously presented to the tailor.Matthew Lee, business development director at Charmston (Holdings), the owner of Gay Giano tailors, said the technology has helped to revive a trade that has experienced a decline in young entrants.Soddy Cheng, a tailoring consultant who has been making suits for decades, said there were only about 200 tailors in Hong Kong, a city of 7million people famed for its high-quality tailoring.Much of the business has moved across the border to mainland China. It is now common for tailors to have their orders made in workshops on the mainland, where labour is cheaper.Cheng said the body scanner had replaced only one of the many steps in tailoring a suit."The tailors seldom meet the customers but the scanner allows them to visualise customers' body shapes."..