4 sizes of economy SAW BLADES FOR ring sizes for jewelry repair. This is a new set of 144 economy SAW blades. This is an affordable blade for beginners and enthusiasts. These blades are the worlds best Tamama blades that allow you to use all metals, wood, plastic, and other features. They are cut straight when they are rushing into and mixing or cutting. These saw blades are size 4. Each piece should be approximately 5 1/4 inches (133 mm) long.