Hello how may I help you? can you look up a record for me? Of course. What would you like to know? who is the world's tallest man? Sultan Kosen is the tallest man alive today. how tall is he? He is 8 feet 1.1 inches tall. is he the tallest man of all time? No. That is Robert Wadlow. how tall was he? He was 8 feet 3 inches tall. interesting, thanks! You are very welcome