Are you an email customer of Jo-Ann Fabrics? They sent out an email with a 20%-off coupon in it, for you, your family and friends. That is 20% off of the entire purchase, including SALE items. I checked, and it's not on the website (they have other coupons there). If you want to be notified of sales and receive such coupons via email, you can go to their website and sign up.
Jo-Ann sells supplies for knitting, crocheting, sewing and non-sew craft projects (such as fleece blankets).