Figuring size

I was doing some figuring for the final size of this quilt. The length is about the size it will be. I only have 4 small seams to put the center strips together. The width, however, is different story. I will take out a 1/2 inch for each seam across the quilt. It will be alot more narrow. I need to put on several more rows to make a regular quilt. So glad I thought of that before I started putting it together.