I think a there's a little confusion about what an "F8" is. F8 means
Fat Eighth so that would be 18X11. An
Eighth is 9x22. I believe the preferred cut is a F8s but 8ths can be sent instead. I tend to use the words F8 and 8th interchangeably but they aren't the same shape at all although they have the same number of square inches. Hope this helps! I'm getting excited about the exchange and should have my fabric by mid-week.
