I recently made a cover for an existing oblong 10x18" pillow by taking a sample of a fabric I like and sewing a single seam in the fabric to make it a "tube" into which I inserted the existing pillow.

Update your old throw pillows with this quick and easy envelope pillow cover tutorial. In about 10 minutes, using one piece of fabric and four straight seams you can learn how to sew these simple ...

Be sure to cover the felt with a pressing cloth before ironing it. 10. Loosely fill the pillow with fiberfill, using the handle of a wooden spoon to gently poke some of the filling into the ears.