Hello how may I help you? Who's the world's tallest man? According to the Guinness Book of World Records, the tallest man in the world is Sultan Ksen. How tall is he? He is 8 feet, 2.8 inches tall. Do you really think that's that tall? For a giraffe, no. For a human, yes. Do you think I could fight him? I'm 5'6" I don't see why not. Height is not a good predictor of fight winning abilities. Hell yeah I'd whoop his I'm sure you would! Thank you bot.