1.We are going to start by lining up the grommets on two strips so they are even with each other on the left and right. Trim the top as needed
2. With your sewing machine set on zig zag (I used a wide, short stitch) sew the two pieces together. I found that pinning was unnecessary. The presser foot can tend to ride up on the grommets and push the tape apart, but just go slow and keep lifting the presser foot to adjust as needed.
3. Now take your shirt and find the center and pin it to the front of the shirt. Stitch along all the edges including the top near the neck.