You can slide these ribs into pockets you've already sewn, into the iron-on rib tape casing or into the rib/ring loop tape casing.

With ribs in your roman shade, you can count on your shade keeping its shape and folding neatly. If you're making an extra wide roman shade, consider adding ribs to help your shade fold with little fuss. And it's easy to cut your shade ribs down to the size you need with sharp scissors.