I had some leftover batting from a few projects I had finished before. Some of the batting was fusible and some of it was not, but it didn't really matter with this project because the batting would be next to the muslin, with the fabric pieces on top of the muslin, so I just used pieces of batting that would fit as many circles as possible. I was able to fit all six of the smallest circles onto one of the larger pieces of fusible batting.
