Over the years I have made lots of these, so colorful! Plus washable.
Either tear or cut rags into strips (about 1" wide) that are as long as possible, then sew them together end to end. From here you can braid them and sew the braids into a circle or what shape suits your purpose. I crocheted (using a single crochet stitch with a large hook) mine and sewed the final end shut to stop it.
What a great project!
Cut each piece in 2 or 3 inch wide strips. Tie the strips together end to end, making a large rope. Finger crochet them together.
This article may help with your project