Sorry forgot to answers this question. I used my 11 1/2" square template for the foundation piece. And as far as the size it will be , Im justing adding another square until I get it the size I want. So it will be a queen size with probably a sash around and the binding or maybe just the binding , Ill have to wait and see how all the squares turn out. You could do the squares in any size, what ever you prefer.