Leonid Stepanovich Stadnyk(born 1971 in Zhytomyr Oblast, Ukrainian Soviet Socialist Republic, USSR) is a Ukrainian man renowned for his stature. He was formerly listed as the world's tallest living man according to Guinness World Records. On August 20, 2008, editor-in-chief of Guinness World Records, Craig Glenday, announced that the title of world's tallest man had been returned to China's Bao Xishun after Stadnyk refused to be measured under the Guinness standard guidelines which require several measurements throughout the course of 24 hours under the watchful eye of a Guinness Book representative. Guinness would then average the height readings to come up with a final official measured height.