Cut out your fabric pieces. You'll need:
Bobbin & Thread:
(2) Large Fabric Squares - for the chair I made in green, they were approximately 18 x 18 inches
(4) Smaller Rectangles - each piece 10 x 10 inches
Make sure your sewing machine bobbin is full and your needle threaded with some thick upholstery thread or some other strong thread.
Fusible Interfacing Time:
If you want to be sure your fabric is extra stable, now is the time to iron in the fusible interfacing. Although my home decor fabric was pretty thick to begin with, I still added the interfacing and I think it made a big difference in the appearance and structure. For the larger square chair with the brown colored bottom to it, I didn't add any fusible interfacing and you can see in the photos that it doesn't look as good as the rest of the chair. The reason that one is multi-colored is because I ran out of fabric! The top portion is a very thick outdoor decor fabric. Next time, I am using the interfacing!
Ironing & Seam Allowances:
Iron every piece you cut & fold over the edges to create a seam allowance of at least 1/2 an inch on all sides. 3/4 of an inch is fine too - just be consistent on all pieces.