Dimensions: 12.7 cm x 2.54 cm. Duck foot shape. Automatically sets the proper sharpening angle. Hold it by the narrow end and place the scalloped end on a flat surface. Tilting the stone from side to side creates a 20 degree sharpening angle on the outer edges of the stone. All you have to do is keep the plane of your blade vertical and trace the edge alternately along each side to sharpen.Also gives you the ability to easily sharpen scissors, serrated edges and sharp objects. The suede carrying case also doubles as a non-slip table pad. Easy to clean with household cleaner, scouring pad and water. Brown leather sleeve.