Lazy Girl Design Interfacing 4pc Stiff Stuff 10' Sq Craft Pk. Shop Lazy Girl Design at the Arts, Crafts & Sewing store. Free Shipping on eligible items. Save on everyday low prices.. Four 10" squares of Stiff Stuff Firm interfacing . Firm, flexible, sew-in, non-woven support for small to medium crafts . Perfect to add a little structure to your next craft project without added bulk or weight . 100 percent polyester, non-woven, machine wash,dry low. Made in USA . Use with Lazy Girl Designs patterns LGD138,LGD139, LGD140, LGD141 . PA LGDSLG07SQ . . .