Versatile Tool - Contains circles, squares, triangles, hexagons, star, curve, arrowheads, and protractor. Premium Quality - Made From High-quality Plastic That's Durable For Long-lasting Use. Range Sizes - The protractor's size ranges from 1/8 to 1 inch. Protractor Dimensions - The protractor measures 5 1/2 x 9 1/2 x .030 inches. A Professional's Choice - Alvin has been the professional's choice for drafting tools and drawing supplies for over half a century. Since 1950, we have brought quality and value to our customers.