Do you encounter situations that you like a pattern, you just must try it and afterwards you do not know what to do with the work? Here is an idea: buy an unicolor pillowcase and sew your work on! Please see my result. For my circles I used a 4ply cake yarn and grey linen pillowcases.  The pattern for the crocheted circle is available free here.

Pillow: Crochet Circle in a Square