I was curious about how Allie pieced out her blocks to get a 10" block and she was kind enough to send this reply: "As to the size of the blocks, there are 5 rows of 5 blocks each, so that is of course 25 blocks in all. I probably used foundation muslin that was 14" X 14" per block, pieced it out to 12" or so, trimmed them to 11" X 11", and then sewed them with a 1/2" seam allowance. Always it is good to piece way bigger than the finished block size to allow for wiggle room when trimming." That is pretty much what I do but since I tend to just work on single blocks, I will have to be a little more careful measuring for multiple blocks that need to be consistent.
I'm still determined to keep my quilt to nine 11" blocks... I had dozens of pictures in my suffragette file and have narrowed it down to 27 and still have to cut that down farther... it's close though.... Some I can use smaller and group 2 or 3 on a block.