Hmm, a six inch square will end up making the dis.nine patch block about
17 1/2" . I have made several and usually have 5 blocks across and 6 down for a good size quilt. I used 6" squares so 5" squares should make a block about 14 1/2". Here is a site that has great directions about the disp. nine patch.
http://blocksnswaps.blogspot.com/200...g-9-patch.html