Sue is a Tyrannosaurus in The Field Museum - the largest specimen found to date, I believe. (Obviously, there are more Sues than this, but it is the Tyrannosaurus Sue to which I refer.) She is pretty big as you might imagine. (At 12.8m long, I doubt that any of the other Sues are bigger than her.) Sue's head has a display case all to itself in the museum (shown) and the one on the rest of the skeleton is a reconstruction (as are many of the other bones).
Right now, I am drinking from a Sue mug, bought in the afore-mentioned Field Museum. Like Sue herself, this is rather giant. Nice.