This 3 piece set of Shapton Glass-stones is the perfect starter set for someone just getting into sharpening or even someone who has been doing it for years. The 1K stone is a great place to start when sharpening because of the toothy edge it will leave. The 4K is the perfect progression after the 1K for the refining of the edge it will achieve. The 8K stone will leave you with a beautifully refined edge with a mirror polish. These are splash and go stones so no waiting while they soak. Each stone measure 8.25” x 2.75”.