Quilted Tea Cozy and Placemat?

I'm making your tea cozy. As you can see, it's my first attempt hence the very simple quilting. I just want to do a test run before I make more.

I am a little confused on how to finish off the start and end points of the binding that goes along the curve. You say in point 10, "folding under the ends of the bias tape on both sides". How do you stitch this so it looks neat on the inside. Please post a picture, if possible, to show how to finish the binding at the bottom sides. Thank you for an excellent tutorial.

By Sandy N.