Step-By-Step Free-Motion Quilting book. The designs are called Portholes, Leafy, Flourish, and Spectrum. This is Flourish, a fluid variation on a simple paisley design.
my etsy shop. Here's a tip for puffy, full pillows. Use a pillow form, feather preferably, that is slightly larger than your cover. These covers are 18", and I used a 20" form.