It was with some trepidation that I stripped down to my underwear and stepped into the booth. The Size-Stream Scanner, as it's known, is currently just a prototype and is merely a space with a curtain pulled around it, fitted with 10 sensors, all trained on different parts of me. The music starts up, I place my feet on the marked spot, and grab a pair of handles. Within seconds the machine has my precise dimensions after taking three scans of my body. On a screen outside I get to see myself modelled in 3D.