Kyoto Nishiyama Wakasa Size: 202 x 78 x h17 The delicate, silk-like fineness unique to Wakasa is attractive. This is an excellent finishing whetstone that is easy to sharpen and produces a razor-sharp edge. This is an extremely rare natural whetstone. The surface is not perfectly flat, so we recommend flattening it before sharpening a plane. Thank you for your consideration.