When my DH and I first met he had a Calif. King. So I made his first quilt 120x120". He wanted the overhang I have made a number of quilts for our bed since we married but we changed to a regular size King and I now make the length longer and the side narrower. Just so I know what direction the quilt is to go on the bed.. It has been a number of years now since I made a king size quilt but it looks like I am going to venture in that direction one more time and with a wham of a quilt that I will hand quilt. I hope to have it finished before I die! More on that later. Keep in mind the weight of a King size quilt too. I find I kick off the king size more often because they are that much warmer when sleeping. Just have fun and don't let the size overwhelm you. The finished quilt will be worth all your efforts. I love the idea of a patriotic quilt and I am sure you will accomplish your goal.