1 fat quarter
fusible interfacing or thin batting
7" zipper (or bigger)
Step 1: I used a cd case to trace my circles, it has a diameter of about 5 1/2". Trace four circles.
Cut out your circles and cut two of them exactly in half. Also cut out a 2"x2" little square for the ring tab.
Trace and cut out your interfacing or batting (I used interfacing), you'll need one circle and two half circles. Adhere your interfacing to the backs of your fabric circles and half circles.
Take a half circle with interfacing on in and place it right side down on top and match up the top edge. Sew the layers together using a 1/4" seam.
Fold both edges down and top stitch in place using a 1/16" seam.
Repeat step 2 on the other side of the zipper.
Fold the two edges in to meet the middle crease you just made.
Then fold in half and iron.
Stitch on both sides to hold it in place.
Fold the tab in half and stitch it on directly over the zipper like so.
Place the circle with interfacing on it right side down on top, and then put the circle with no interfacing right side up on top.
Sew around the outside of the circle with a 1/4" seam. Make sure that all your layers meet up nicely as you go. Trim off the excess zipper and use pinking shears around the outside edge. If you don't have pinking shears, you can just cut some slits along the outside edge, but be sure not to clip the seam you just made.
For my topstitching, I did not go over the zipper. I did one half circle and then the other.