Right now I've used the 5 inch square and the 6 1/2 inch square and 6 1/2 inch triangles. But remeber I've used them to make only 5 quilts so far. I'm still a newbie. But did I mention I started quilting like 3 months ago I believe...so a good many quilts in as much time I think. :)
I also have the 2 1/2 inch strip which is nice for cutting binding and if you want to do smaller 9 patch borders etc. :P
Anyway, I really like it...I don't mind the rotary, but appriciate the precision of this AccuQuilt.