1. Take your front cushion panel on a flat surface and using an invisible zipper the length of your bottom edge
lay it facing right sides together, matching the edge of the zipper tape with the edge of your fabric.
2. Using sewing pins or fabric clips you want to secure your zipper in place.
3. The front of the zip will be facing the front of the panel - Right sides together.
4. Head over to your sewing machine and make sure it is set-up with your concealed zipper foot attachment.
5. Start stitching just behind the zip teeth. The zipper foot should naturally lay in place as it has grooves underneath it, through which the teeth of the the zip slide so that the needle stitches extremely close to the teeth if not under them.
6. This closeness is essential for a perfectly stitched invisible zipper.
7. Stitch the length of your zipper until you reach the zip slider. You will know once you have reached this point as you won't be able to sew past the zip slider with the concealed zipper foot attachment.
8. Back tack your stitch to secure.
9. Snip your threads and return to your work station.
10. Now take your back cushion panel and the side of the zip that is not sewn down and clip or pin in place to secure.
11. Repeat the same process as step 5 and secure your zip to your back panel.
12. Snip your threads and return to your work station. Have your zip around 2/3's of the way closed leaving around 1/3 open. Lay your panels on the table with the design facing up you are going to flip your back panel on top of your front panel so that they are right sides together.
13. Secure all edges in place with pins or clips and take over to your sewing machine.
14. Starting from your last stitch at the zipper stitch along to your corners with a 1cm seam allowance. Stopping 1cm before the corners edge. Sink your needle and pivot the fabric 90 degrees, then continue sewing down the length of your fabric, repeating the process when you reach each a corner, stopping 1cm before the corner, sinking your needle and pivoting.
15. Once you have sewn round the entirity of the cushion, snip your threads and return to your station.
16. Cut your corners ( this ensures a clean finish ) turn your cushion cover through and you are ready to fill it with a cushion or wadding. It's as easy as that :)