The Good Measure name represents a high quality and accurate measuring system and the good that comes in the form of a donation to breast cancer research for every Good Measure Ruler sold. Make a difference while making something beautiful. Feel good about your choice to purchase Good Measure Rulers - the only rulers with a cause. The 60 degree Triangle has three equal sides. It can be used to create borders, plates, or the popular Thousand Pyramids quilt block. Good Measure rulers make it easy for right-or left-handed users to position the ruler on their fabric. Abundant sight lines will short, open spaces assure accurate fabric placement under the ruler for perfect cuts every time! All Good Measure rulers are designed to be compatible with each other, ensuring accurate cuts and allowing you to utilize these rulers for all your cutting needs. Each ruler is labeled with its size or the name of the name of the specific job it does. Good Measure rulers are accurate, easy to read and versatile. Made in the USA!