You definitely can! Although we only show the sizes for 14 and 18-count on our charts, in reality, a cross stitch design can be done on any count such as 9-count, 11-count, 28-count or more. The only difference would be the finished size and the amount of threads needed. If you need the fabric/thread calculation changed for a particular design, just let us know and we would be happy to make the changes for you according to the count you would like to stitch on.