I'm gonna add to yer confuzion (like the spelling :D ?) by saying that Leader measures about 65cm and weighs in at 42-45kilos (working weight). I don't put him on a diet, just increase the activity, leaving him outside when I'm at work and swimmiing when I can find the time to take him (2 jobs! lol) He's a little long but if you take a look at the following site you'll see pictures of him (and my lovely Teena who's gone).
http://community.webshots.com/user/beaderbaby
I personally ADORE the enormous rotts, just to loo at. They can't work French Ringsport or mondioring, poor babies (:D :D ;) )