I tried it with and without binding and think I like the binding better. And it gave me the opportunity to learn about binding cut on the bias to give it the stretch to go around the curves. Very interesting lesson.
The pattern is called the Scrappy Leaf key fob found on Etsy, and the idea came from the Pink Penguin blog where she expanded the template to create a larger leaf. I had to do the same thing with the pattern but I think it turned out so cute.