since a fat quarter is cut by cutting a 1/2 yard of fabric (so should always be 18") then cutting the 1/2 yard piece in half along the fold one measurement is not always 22"...it depends on the width of the fabric, i have purchased fat quarters that were only 18" square...because the fabric on the bolt was only 36" wide...so, it can vary by a large amount. and then if you tend to pre-wash you will probably only ever have 16-17" of usable by the time you square up...if you really have to have fq's that are 18"x22" you are best off cutting your own out of yardage...that way you can start out larger to make up for shrinkage and squaring up.