I'm not at home to check mine, but if you trust Newegg at all, they've got one of the reference models showing these:
11.02" x 4.33" x 1.5"
I believe it is 11" as it was said to be as long as the 69xx, just with a slightly angled shroud.
The reference PCB is 10.5" long exactly. The reference cooler makes the complete card a hair over 11" long.