Thanks but I can't take any glory for the design. It is a
"Pieceful Designs" pattern and called Sipper Slippers.
They are reusable hot protector.
Foxflower, you just about hit it right on target.
The curved pattern is a finished 10" on the top and a finished 9" bottom and the width is 3"
The site for the pattern is www.piecefuldesigns.com
...and they are quite easy.