i make pillowcases from a free pattern i have a print out of. 27x41 is the measurement. then i think 12 inches of focus end fabric and an inserted one of 3 inches folded. the 41 or so is the fold that would go around the pillow. not 22. maybe they mean cutting 22 with the fabric folded.
here is a freebie
http://quilting.about.com/od/quiltpa...se-pattern.htm
and this one
http://www.craftandfabriclinks.com/p...ses/cases.html