I used "Thangles" for the first time this weekend for finished 4inch HSTs. I love them, and they were so easy to use. For anyone new to them as I was, when they quote for "finished size" they mean after the block is sewn into the quilt. I can not believe how many websites sell them and only the Thangles site explains this fact. Maybe I have a lot to learn but when I talk about finished block, I am meaning prior to it being in the quilt. So I messed up at first and bought 4.5 inch Thangles, because I am working on a design that when the block is sewn into the quilt it measures 8 inches. I was pairing HSTs with my unfinished 4.5 inch 9 patches. Oh well the mistake sent me to the LQS where I spent more than I intended. So no bother I am happy.