Here is this week’s Hancock Fabrics weekly ad valid through October 8, 2014. This Hancock Fabrics ad features halloween costumes and decorations! This ad was released on Thursday, September 25th. If you plan on making your own costume for halloween, Hancock is the place to shop for the fabrics and embellishments. Hancock Fabrics is a craft and sewing store similar to JoAnn’s Fabrics.