I found them easy to make and plan to make more. I have already given one away.
I started with 2 - 10" squares of fabric and 2 - 10" squares of 100% cotton batting.
Layer a piece of fabric with each piece of batting and do simple quilting to hold the layers together.
Sew the darts for the size chosen.
12 " x 12 " size bowl holders: I used 1 " across and 2 1/2 " down for the darts
10 " x 10 " size bowl holders: I used 1 " across and 2 " down for the darts.
Place right sides together and sew around, leaving an opening to turn inside out.
After topstitching around the edge, it is finished.