FWS blocks are 6" finished, so 6-1/2" unfinished.
With the number of seams, you really do need to be precise on your piece cutting as well as your 1/4" seams. A thread plus or minus will make such a difference.
There has been a whole series of threads re the FWS blocks, as several ladies did the quilt together on a 2 block per week basis. Here's a link to the finished quilts
http://www.quiltingboard.com/blocks-...e-t148904.html
Mine is at post #203
There are still many working on the quilt, and posting to the appropriate threads ... so why don;t you join in on the fun as those who have gone before you still come to the threads as you post to oooh and aaah and help.