The Lone Star is in one piece; all 8 points sewn together with the background squares and rectangles sewn in place. The first of the 5 borders is attached. The top is just over 60 inches square at this point. The final size will be about 110 inches square.
The biggest challenge in turning the 8 individual star points into this was to cut the background pieces. I had to cut one 25¼ inch square and four 17½ inch squares.
I used a tip from Fons and Porter's TV show and cut a piece of freezer paper using my 12½ inch square ruler. I ironed that to the fabric, then used my long rulers to measure to the width I needed and cut the fabric. I also used the markings on the cutting mat to double check my measurements.
Caution: Make sure you don't shave off the edge of the freezer paper when you cut or your squares won't be square. Ask how I know. Fortunately, I both overestimated the amount of fabric needed and bought 1/8 yard more than I thought I needed, so I was able to recover from my mistakes.
To cut the 25¼ inch square into triangles, I used my 2 long rulers. I placed them side by side, but staggered with about 11 inches of the edges touching so the line extending from the touching edges reached corner to corner. I was careful to only move one ruler when cutting and put it back before moving the other ruler to complete the cut. Result: 4 beautiful triangles that are 17 7/8 by 12¼ inches.
Let me introduce you to 2 of my favorite tools for measuring quilts for borders: my hardwood floor and my dust mop. When I work on a large quilt, I really love my hardwood floors. They're nice, solid and flat for stretching out the quilt top to measure. Before I spread the quilt top on the floor, my friend the dust mop gets used. The dust mop is 2 feet wide, designed for businesses. I saw one on a TV show when I bought this house and knew it was just the thing for the large amount of hardwood floors.