Geeze I am hoping somebody else knows the answer because I don't for certain.
I took some pictures of them on my 2011 trip and even took a picture from the inside:
I'm pretty certain they are NOT square though. If I had to guess they are either 8x10 or 10x12. I had enough head room in the middle to stand straight up so it's at least 6.5ft tall. It does appear to be a good quality tent. But I didn't hit it with a tape measure so I can't give a SURE size. But it's one of the two dimensions.
Anybody else know for certain?
Bama Ed
PS - I'll put this on my list of things-to-do next trip if I can find a tent being set up....