It really would not be that much extra work to make it 7 X 7, since I have the blocks cut already (not sewn, but cut). I have blank white blocks ready to add some applique or maybe even some photos, but I just needed help deciding. When I recently did the 16 patch and pinwheels for another top, I did not put the border at the top because it was already long enough. I thought that looked unfinished and wanted to be sure I had borders on four sides this time. Seven blocks wide by seven long will more than cover the top if I figure correctly, but I know "square" is better for a king.
Give me your opinion of this fabric for a border:
http://www.hancocks-paducah.com/Item--i-TT-8665-NEUTRAL
I think this is 11" wide. So then outside of this border I could use the remainder of the Stonehenge fabric that is around the windows.