The curves are formed by varying the width of the strips; those on the light side are half the width of the dark strips.
The quilt will finish at about 72" square (sometimes they shrink a little after quilting). I decided to forgo a border. I have a couple of different prints reserved for the binding (will decide which to use later) and am creatively piecing the backing. Remember those logs I cut the wrong size? Well, they are coming in handy for the back. I had a large piece of Fig Tree fabric I wanted to use for the back but it was just a little too short to work on its own. So I'm extending it with a pieced inset. It's a bit more work but thrifty and I am liking the look.
Next up: binding the monster size quilt.