Throw away your ruler. Sizzix makes it easy to cut your material into shapes for your quilt. The 3 1/2" Diamonds Sizzix Bigz XL Quilting Die is easy to use. It will cut the perfect shape every time, with no measuring needed. This Bigz Pro die measures 12" x 25". It's the largest die Sizzix makes. It can cut a wide range of materials, including fabric, perfectly. It can only be used in a Big Shot Pro machine with a set of Extended Big Shot Pro Cutting Pads (all items sold separately). Your three diamond shapes will measure 3 1/2" x 18 1/2" when finished (3 3/4" x9" unfinished).