It's from the Fat Quarter Shop's Decade the Halls quilt. You can get the free pattern here. It's the most adorable star in an octagon which they used for their ornament block. It's so easy because none of the points have to match up!
Yes, that's right. Take a close look at the octagon corners and the star points. Not an exact half square triangle. No matching to a corner point. And the stars have an overlap too. Lots of wiggle room!
I'm going to try a few without the ornament top and hanger, and alternate with plain blocks. Should be a great way to use up some scraps! It makes a 5 inch block (4.5 inches finished) which is a really easy size to work with. The pieces aren't too tiny.
Here's how far I am with the official pattern...