Stock up on the Craft Knife Replacement Blades for your Sizzix Craft Knife (sold separately). These replacement blades are part of the Making Essentials Collection by Sizzix. You'll love that they feature precision cutting and trimming that help you avoid ripping and tearing after you cut delicate materials with a Sizzix machine. Included in the package are six replacement blades and one handy storage case. These blades measure 0.5" x 1.75".