How tall is Machine Gun Kelly

Colson Baker is an American rapper best known for songs such as "Sail", "Till I Die" and "Wild Boy". In 2011 (on twitter) he said "Bout to have an armrest war with this guy on the plane. I'm 6'3 buddy...I'm using this f***in armrest", although in 2013 he claimed "6'4" a couple of times.
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