This puff quilt was made by Katie Olson of Serendipity Studio in Washington. It measures 46" x 38." She used a soft, minky fabric. The ruffle is a nice touch too. They're also called bubble, biscuit, or Yorkshire puff quilts.
There is a video by Rose Smith on You Tube showing how to make a puff quilt.
Have you ever made one? I haven't, but it looks like fun.