You will need a package of PRE-FOLDED cloth diapers, I found these at Wal-Mart for $12-something for 10. These are a gauze like material, not traditional cotton but they'll do. Measure the center section, mine was approximately 4"x17" so I cut my fabric 5"x20".
Now take the flannel and iron a hem all the way around, about an inch so to fit the center section of your cloth diaper. I like a large hem so if it frays the stitching will stay intact under the cloth, these are going to get washed almost everyday for quite some time.
Next pin the flannel to the center of your diaper, stitch around the edge all the way around to secure. I prefer to off-set my needle so my stitches lay close to the edge of the flannel, I think it looks more finished.
Start off with two 6"-7" square of fabric. Place them either front to front or back to back so your shapes match. Cut them into a circle, I used a CD spindle as a template and it worked perfectly.
Line up your new seems and secure with a zig-zag stich, I prefer to double stitch. Once down and then again back up the seem. This will be on the inside but keep it as neat as possible.
Turn your TeePee right side out and zig-zag from the center to the edge, once again securing your seem. Keep in mind these are going to get washed often.
There you have it! A finished set!! I give two or three of each as a set. If you give this project a try I'd love to see your take.