The squares in this particular quilt top "began life" at 3.5"
so the original 9 patches are 9.5" (unfinished) and the "disappeared" (yes I know it's probably not a word I'm not illiterate.. just a little silly) 9 patches are 9" unfinished.
I have made this pattern several times. I have started with 3.5" squares.. 5" squares and 6.5" squares..
Think I'm going to try an even smaller square next time.. hmmmm..