Matt says on 8/Feb/11
Did some more research, hes actually answered a question about his height with "some say 6'1, some say 6'2'". He always looked slightly taller than 3EBs old guitarist Kevin Cadogan who claimed 6' 1'' tho, so I'd guess hes probably somewhere between.

Matt says on 6/Feb/11
He always looks tall in videos/interviews/appearances etc. except when he was dating Charlize Theron. There were some pictures where they looked the same height. Then again in 5-inch heels she would 6' 2'', so that makes sense.