CW squares
I have about a half a ton of 3 inch squares. My goal has always been to make a CW, and I already have a head start. Most patterns I have seen say to start with a 9 1/2 square of background, and a 2 1/2 in square for the "window". I really don't want to go back and recut all those squares, and I am mathematically challenged. What size background squares would I need to accommodate my 3 inch squares?