We saw Darth Vader's original costume from episodes IV through VI. When you stand in front of the costume you realise just how tall Darth Vader must have been. (I looked it up later - the actor inside the costume was 6 foot 5in).
Later on in the exhibit I came across Anakin Skywalker's costume from episode II. I found myself thinking:
Gee, Anakin's costume is tall. I wonder if he was as tall as Darth Vader?