I'm working on one now and am skipping the batting. I'm using 8.5" circles with 6" squares. And may end up using a different colour of Kona for each square, I'm not 100% sure yet. It might be a good time to use scraps instead of stash.
I think some may say I cheated. I used a die cutter (AccuQuilt Studio) to cut out the circles. I don't think I would stick with the project if I had to cut all those squares by hand. I'm using 112 circles. Although, I did notice that they had a rag circle die for the AccuQuilt GO now too, that is designed for this quilt project. But I already had the 8.5" circle die.