I have made a few rag rugs in the past and just braided them. If one strip of fabric was fairly wide I would split it down the middle but not all the way, about an inch from the bottom and just splice. Lot of youtube videos on rag rugs. I would use upholstery thread and needle to stitch (attach) together. Been a long time. If you recycle jeans they make really good rugs. I use the seam part of jeans and shirts. you can open those up a little if you want. You don't have to be particular. I don't crochet and a few I know who do crochet say crocheting rag rugs is rough. They also braid and knot.