You can make 2 pillow cases for 18x18" pillows, if choosing the option: linen-cotton canvas or cotton twill, as those are larger fabrics and better for sewing pillows. Detailed tutorial can be found @ my blog (http://likeflowersandbutterflies.blogspot.com/2012/09/easy-mustache-pillow-cases-tutorial.html) (http://www.flickr.com/photos/flowersandbutterflies/7991972904/)