Dimensions: Stone = 6" x 1" x 5/32"; Plate = 3/32" Thick = Total thickness 1/4"</br></br>Product Description</br></br>400 Grit Fine Stone Aluminum Oxide. Used for finishing most kitchen knives and for re-sharpening. The same as a 2000 grit Japanese water stone.</br><br/>http://www.amazon.com/gp/product/B00CIV5VSK