>>10222953I'm not sure of his exact age in the current continuity, but it's based on his look from the recent Young Justice comic, where he's usually drawn only slightly taller than 5'6" Tim Drake. It varies depending on the artist though(or sometimes even in the same comic),so I just go by the the most recent DC encyclopedia stats.
It's not a huge deal, of course, since overly tall figures can be fudged in with smaller ones by bending the knees. I just wish McFarlane paid a little more attention to scale in general.