Place the pocket panel on the lining as shown in the photo above and sew.
With assembled lining right side up, center zipper right side facing up along top edge.
Place the outer layer, right side down on top. Pin in place.
Using your zipper foot, sew along top edge using a 1㎝(3/8″) seam allowance.
Attach the outer and lining to the other side of the zip the same way.
Open out, press pieces away from and top stitch on both 0.3cm(1/8”) away from the zipper.
Fold the side panel in half and sew the top.
Turn the side panel inside out and sew the top.
Place the side panel on the inside of the zipper panel and sew.
Place the zipper panel between the outer fabric and the lining of the back panel and sew it.
Do this by marking the quarter of your main panel and the quarter of your zipper panel (these are attached to each other at this point but just fold the piece in half to find the center).
Now, using your quarter marks, start pining the bottom of your zipper panel around the perimeter of your main panel.
Sew all the edges with an allowance of about 1㎝(3/8″).
Place the right side of the lining on top. Sew with an allowance of about 1㎝(3/8″), leaving an opening. Turn it right side out.
Use the same process to sew the zipper panel to the other side of the main panel.
After this, sew up this hole, and the cosmetic bag is ready!