FQ measurements are usually 18x22, unwashed from the store. I think the measurement for this swap should be changed to 18x21 to give participants a little lee-way because they are prewashing the fabrics. I can't participate in this swap right now but I teach a couple of classes to a Sr. Ctr. on different things to make out of FQ's and have found that I had to change some of the patterns measurements because of the shrinkage when prewashing. Just my opinion/suggestion.