Took a class with Kaye England and she is a great promoter for the "Cut for the Cure" rulers. They are the best rulers I have ever used because you can actually see the edge of your fabric at various places on the placement line which enables you to have an exact cut with no guess work. There is a quarter square and half square triangle that are great for making "flying geese." They are a little "pricey" but they will never have to be replaced and there are so many different types of rulers that take the guess work out of measurements. Part of the selling price is donated for breast cancer research which is a plus for me since I lost my Mom and my aunt to breast cancer. Your LQS should have them.