That's pretty!! You did a great job. Mine aren't big and rounded either but maybe don't pull it as tight around the CD and put more stuffing? I would just try different ways of doing it. It's a great way to use fancy fabrics that you might not put in a quilt.
It isn't my tute, I found it posted in the Links section. I've made 3 of them, gave two away and one for myself. I have several dozen CDs to make some more when I clear up a few projects that are almost done.