This is so cool, I just had to share it! This rug is created by using old jeans and leftover cotton yarn. You will need 2 or 3 pairs of old jeans. To crochet the rug, you can use a 5.0 mm crochet hook.
You can find the free crochet pattern of the Denim Rag Rug on the website of My Poppet Makes.