The Lori Holt Sew-in Interfacing is a non-fusible, light/medium weight sew-in interfacing. This product is awesome for use with Lori's Sew Simple Shapes™ and also works with her specialty rulers. The interfacing is precut in 10" x 10" squares, and the package contains 100 squares. They are perfect for sew alongs, craft projects, and more!