I saw them at this size or slightly smaller in the wild.
True beasts.
If you dive Ras Mochamed you will see alot of those and in what looks to be even larger, but it might be due to its underwater or the general euphoria of the amazing dives there.
For those of us in the states, go check them out at the Mandalay Bay Aquarium in Las Vegas. Full grown sohals and vlamingis. Really stunning beasts!
I was going to say! This is the only place (and the tanks throughout ceasar's) where I've seen full grown sohals and all types of nasos. Granted these are in 10s of thousands of gallons, so that helps!