This ruler will make trimming your flying geese blocks a breeze. Follow the method as outlined in the packaging. Just line up along the bottom edge of the block and use your rotary cutter to get a perfect finished shape. This ruler can be used for flying geese blocks in sizes 1.5 inches x 3 inch and 3inches x 6 inch. A perfect 1/4 inch at the top of the point is easily achievable with this method. You will be putting flying geese blocks in lots of projects and enjoying the process.