Right they're massive. I think its about 51" across with a slight pitch in the middle for viewing angles. Which is about the same length as my 88-key MAUDIO Keystation. It's also a hefty investment. At first I was like "wow, I have to turn my head!!" but it feels natural now. I added the 3rd since I commonly Code, Research, Review or Have Logic Pro open Composing, Plugins, Mixer (tracks) etc ...
Nice too because I can split the 3rd one between my MBPro and my main Production box so its a tad more versatile.
One thing I do miss is multi video in's on these monitors. But the quality is insane so I forgive them.