Creative Grids Sid is a straight, curvy quilting tool with a cut out center to helping you create some amazing designs. Straight side: Has a nice long straight edge, needle stops on both sides to help you get perfect spacing between your lines. The marked line also help you end up exactly where you want. Cut Out Center: Will help you master stitching in the seams of your quilt by keeping you on track. Or you can rotate the ruler to create intricate designs such as the starburst design. Curvy side to quilt brackets: The Bracket quilting design is a slightly curvy, slightly pointy design that's perfect for skinny border, repeated as an allover design or perfect for quilting blocks. Creative Grids Grip ensures the tool doesn't slip while quilting. Black and white dashed guide lines are visible on all fabric colors. Measures about 4-1/2" x 6". Made with 1/4" thick high-grade acrylic that is perfect for both longarm and home sewing machines.