How tall is The Undertaker

Mark Calaway is an American Wrestler. In a 2001 documentary he referred to himself as being "About Six foot Eight, Six Nine". On another occasion he said "I used to be 6-foot-10 but I got dropped on my head a few times so I'm 6-foot-9 now."
By AngelCaroll-Ann0770 [CC BY-SA 3.0], via Wikimedia Commons