You take 5" squares (perfect for charm packs of which I have many!) and make 9-patches out of them.
You take this little 3 1/2' Lil' Twister ruler and lining up the lines on the ruler with the seams you've just sewn, slice up the nice little blocks leaving this behind:
But what you get are these cute 12 1/2" pinwheel blocks that would make a lovely baby quilt, which is what I'm making this for--
You might think there's a lot of waste but you can cut the remaining scraps into 2 1/2" squares. I used 36, 5" squares for this quilt center so have 36, 2 1/2" squares to use for the border or whatever. They also make a larger one of these rulers to use with "layer cake" charms. I think I might buy one!
Oh, and I spent 2 1/2 hours on this project. I plan to add sashing and borders and am thinking about making it Minkee!