From Studio 180 Designs: Trim the corners from existing blocks and add a new corner; then trim block for accuracy. The 'Pop-abilities' are endless. This is the original Corner Pop tool ; this has a 1 to 1 ratio. Your 'popped' area will be equally high as they are wide. WATCH THE STEP BY STEP TUTORIAL VIDEOS!! " ORIGINAL VIDEO"and learn just how easy it is!! " NEW / UPDATED VIDEO HERE" . The quilt shown is the background of this video is: "Fletcher Farm Stars Pattern" .