Sans appears as a short, paunchy skeleton with a wide toothy smirk, large eye sockets. He wears an unzipped blue hoodie, a white top, black shorts with white lining, and a pair of salmon-colored slippers. He has white pupils that disappear when he is serious or angered. When Sans uses telekinesis, his left eye flashes light blue and yellow, the colors for Patience and Justice , and his right pupil disappears. He also has an almost permanent smile.