Over 6 feet. I've see him work out ar Venice a bunch w his wife.
Look at the video. Either:
A) Irvine wears lifts, and recently took them off.
B) Phil Heath is wearing lifts in the video. (Something he's not known to do.)
C) Irvine has suffered the fate of old lifters and has lost some inches in height due to spinal compression.
Given that the internet lists his height at 5'10" - 6'1", I think it's safe to say that there's something odd about this. Going by the video, even 5'10" is generous. We all know that Phil Heath is a manlet.